Mar  7 17:20:18 backup_nas kernel: [83599.144135] r8169 0000:05:00.0 enp5s0: link down
Mar  7 17:20:26 backup_nas kernel: [83606.809340] r8169 0000:05:00.0 enp5s0: link up
Mar  7 17:20:36 backup_nas kernel: [83617.273911] r8169 0000:05:00.0 enp5s0: link down
Mar  7 17:21:19 backup_nas kernel: [83660.202505] r8169 0000:05:00.0 enp5s0: link up
Mar  7 17:21:20 backup_nas kernel: [83661.523541] r8169 0000:05:00.0 enp5s0: link down
Mar  7 17:21:23 backup_nas kernel: [83664.479614] r8169 0000:05:00.0 enp5s0: link up
Mar  7 18:26:52 backup_nas kernel: [87593.100982] ata3.00: exception Emask 0x0 SAct 0x18000 SErr 0x0 action 0x6 frozen
Mar  7 18:26:52 backup_nas kernel: [87593.101044] ata3.00: failed command: WRITE FPDMA QUEUED
Mar  7 18:26:52 backup_nas kernel: [87593.101088] ata3.00: cmd 61/08:78:48:45:b8/00:00:06:00:00/40 tag 15 ncq dma 4096 out
Mar  7 18:26:52 backup_nas kernel: [87593.101088]          res 40/00:01:06:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
Mar  7 18:26:52 backup_nas kernel: [87593.101184] ata3.00: status: { DRDY }
Mar  7 18:26:52 backup_nas kernel: [87593.101212] ata3.00: failed command: WRITE FPDMA QUEUED
Mar  7 18:26:52 backup_nas kernel: [87593.101255] ata3.00: cmd 61/08:80:38:45:b8/00:00:06:00:00/40 tag 16 ncq dma 4096 out
Mar  7 18:26:52 backup_nas kernel: [87593.101255]          res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
Mar  7 18:26:52 backup_nas kernel: [87593.101350] ata3.00: status: { DRDY }
Mar  7 18:26:52 backup_nas kernel: [87593.101381] ata3: hard resetting link
Mar  7 18:26:57 backup_nas kernel: [87598.452915] ata3: link is slow to respond, please be patient (ready=0)
Mar  7 18:27:02 backup_nas kernel: [87603.132861] ata3: COMRESET failed (errno=-16)
Mar  7 18:27:02 backup_nas kernel: [87603.132906] ata3: hard resetting link
Mar  7 18:27:07 backup_nas kernel: [87608.484798] ata3: link is slow to respond, please be patient (ready=0)
Mar  7 18:27:12 backup_nas kernel: [87613.164746] ata3: COMRESET failed (errno=-16)
Mar  7 18:27:12 backup_nas kernel: [87613.164790] ata3: hard resetting link
Mar  7 18:27:17 backup_nas kernel: [87618.516686] ata3: link is slow to respond, please be patient (ready=0)
Mar  7 18:27:47 backup_nas kernel: [87648.220345] ata3: COMRESET failed (errno=-16)
Mar  7 18:27:47 backup_nas kernel: [87648.220390] ata3: limiting SATA link speed to 1.5 Gbps
Mar  7 18:27:47 backup_nas kernel: [87648.220392] ata3: hard resetting link
Mar  7 18:27:52 backup_nas kernel: [87653.272288] ata3: COMRESET failed (errno=-16)
Mar  7 18:27:52 backup_nas kernel: [87653.272333] ata3: reset failed, giving up
Mar  7 18:27:52 backup_nas kernel: [87653.272364] ata3.00: disabled
Mar  7 18:27:52 backup_nas kernel: [87653.272383] sd 2:0:0:0: [sdc] tag#15 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Mar  7 18:27:52 backup_nas kernel: [87653.272387] sd 2:0:0:0: [sdc] tag#15 Sense Key : Not Ready [current] 
Mar  7 18:27:52 backup_nas kernel: [87653.272390] sd 2:0:0:0: [sdc] tag#15 Add. Sense: Logical unit not ready, hard reset required
Mar  7 18:27:52 backup_nas kernel: [87653.272394] sd 2:0:0:0: [sdc] tag#15 CDB: Write(16) 8a 00 00 00 00 00 06 b8 45 48 00 00 00 08 00 00
Mar  7 18:27:52 backup_nas kernel: [87653.272397] print_req_error: I/O error, dev sdc, sector 112739656
Mar  7 18:27:52 backup_nas kernel: [87653.272464] sd 2:0:0:0: [sdc] tag#16 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Mar  7 18:27:52 backup_nas kernel: [87653.272468] sd 2:0:0:0: [sdc] tag#16 Sense Key : Not Ready [current] 
Mar  7 18:27:52 backup_nas kernel: [87653.272471] sd 2:0:0:0: [sdc] tag#16 Add. Sense: Logical unit not ready, hard reset required
Mar  7 18:27:52 backup_nas kernel: [87653.272475] sd 2:0:0:0: [sdc] tag#16 CDB: Write(16) 8a 00 00 00 00 00 06 b8 45 38 00 00 00 08 00 00
Mar  7 18:27:52 backup_nas kernel: [87653.272477] print_req_error: I/O error, dev sdc, sector 112739640
Mar  7 18:27:52 backup_nas kernel: [87653.272552] ata3: EH complete
Mar  7 18:27:52 backup_nas kernel: [87653.272579] sd 2:0:0:0: [sdc] tag#20 FAILED Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:27:52 backup_nas kernel: [87653.272583] sd 2:0:0:0: [sdc] tag#20 CDB: Write(16) 8a 00 00 00 00 00 06 b8 45 40 00 00 00 08 00 00
Mar  7 18:27:52 backup_nas kernel: [87653.272585] print_req_error: I/O error, dev sdc, sector 112739648
Mar  7 18:27:52 backup_nas kernel: [87653.272658] sd 2:0:0:0: [sdc] tag#22 FAILED Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:27:52 backup_nas kernel: [87653.272660] sd 2:0:0:0: [sdc] tag#21 FAILED Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:27:52 backup_nas kernel: [87653.272662] sd 2:0:0:0: [sdc] tag#22 CDB: Write(16) 8a 00 00 00 00 00 70 02 bb a8 00 00 00 68 00 00
Mar  7 18:27:52 backup_nas kernel: [87653.272664] sd 2:0:0:0: [sdc] tag#21 CDB: Write(16) 8a 00 00 00 00 00 06 b8 45 50 00 00 00 30 00 00
Mar  7 18:27:52 backup_nas kernel: [87653.272666] print_req_error: I/O error, dev sdc, sector 1879227304
Mar  7 18:27:52 backup_nas kernel: [87653.272681] sd 2:0:0:0: [sdc] tag#25 FAILED Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:27:52 backup_nas kernel: [87653.272686] sd 2:0:0:0: [sdc] tag#25 CDB: Write(16) 8a 00 00 00 00 00 06 b8 45 18 00 00 00 20 00 00
Mar  7 18:27:52 backup_nas kernel: [87653.272689] print_req_error: I/O error, dev sdc, sector 112739608
Mar  7 18:27:52 backup_nas kernel: [87653.272778] sd 2:0:0:0: [sdc] Read Capacity(16) failed: Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:27:52 backup_nas kernel: [87653.272778] sd 2:0:0:0: [sdc] tag#23 FAILED Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:27:52 backup_nas kernel: [87653.272781] sd 2:0:0:0: [sdc] tag#23 CDB: Write(16) 8a 00 00 00 00 00 bc 01 3e e0 00 00 00 68 00 00
Mar  7 18:27:52 backup_nas kernel: [87653.272781] sd 2:0:0:0: [sdc] Sense not available.
Mar  7 18:27:52 backup_nas kernel: [87653.272783] print_req_error: I/O error, dev sdc, sector 3154198240
Mar  7 18:27:52 backup_nas kernel: [87653.272787] sd 2:0:0:0: [sdc] Read Capacity(16) failed: Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:27:52 backup_nas kernel: [87653.272789] sd 2:0:0:0: [sdc] Sense not available.
Mar  7 18:27:52 backup_nas kernel: [87653.272798] sd 2:0:0:0: [sdc] Read Capacity(16) failed: Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:27:52 backup_nas kernel: [87653.272799] sd 2:0:0:0: [sdc] Sense not available.
Mar  7 18:27:52 backup_nas kernel: [87653.272813] sd 2:0:0:0: [sdc] Read Capacity(10) failed: Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:27:52 backup_nas kernel: [87653.272814] sd 2:0:0:0: [sdc] Read Capacity(16) failed: Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:27:52 backup_nas kernel: [87653.272815] sd 2:0:0:0: [sdc] Sense not available.
Mar  7 18:27:52 backup_nas kernel: [87653.272816] sd 2:0:0:0: [sdc] Sense not available.
Mar  7 18:27:52 backup_nas kernel: [87653.272818] sd 2:0:0:0: [sdc] Read Capacity(10) failed: Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:27:52 backup_nas kernel: [87653.272819] sd 2:0:0:0: [sdc] Sense not available.
Mar  7 18:27:52 backup_nas kernel: [87653.272841] sd 2:0:0:0: [sdc] 0 512-byte logical blocks: (0 B/0 B)
Mar  7 18:27:52 backup_nas kernel: [87653.272842] sd 2:0:0:0: [sdc] 4096-byte physical blocks
Mar  7 18:27:52 backup_nas kernel: [87653.272846] sd 2:0:0:0: [sdc] 0 512-byte logical blocks: (0 B/0 B)
Mar  7 18:27:52 backup_nas kernel: [87653.272848] sd 2:0:0:0: [sdc] 4096-byte physical blocks
Mar  7 18:27:52 backup_nas kernel: [87653.272884] sd 2:0:0:0: [sdc] Write Protect is on
Mar  7 18:27:52 backup_nas kernel: [87653.272886] sd 2:0:0:0: [sdc] Mode Sense: 70 cc 9f fc
Mar  7 18:27:52 backup_nas kernel: [87653.272896] sd 2:0:0:0: [sdc] Read Capacity(10) failed: Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:27:52 backup_nas kernel: [87653.272898] sd 2:0:0:0: [sdc] Sense not available.
Mar  7 18:27:52 backup_nas kernel: [87653.272918] sd 2:0:0:0: [sdc] Read Capacity(10) failed: Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:27:52 backup_nas kernel: [87653.272919] sd 2:0:0:0: [sdc] Sense not available.
Mar  7 18:27:52 backup_nas kernel: [87653.272923] sd 2:0:0:0: [sdc] Read Capacity(16) failed: Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:27:52 backup_nas kernel: [87653.272924] sd 2:0:0:0: [sdc] Sense not available.
Mar  7 18:27:52 backup_nas kernel: [87653.272938] sd 2:0:0:0: [sdc] Read Capacity(16) failed: Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:27:52 backup_nas kernel: [87653.272940] sd 2:0:0:0: [sdc] Sense not available.
Mar  7 18:27:52 backup_nas kernel: [87653.272982] sd 2:0:0:0: [sdc] Read Capacity(10) failed: Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:27:52 backup_nas kernel: [87653.272984] sd 2:0:0:0: [sdc] Sense not available.
Mar  7 18:27:52 backup_nas kernel: [87653.272995] sd 2:0:0:0: [sdc] Read Capacity(10) failed: Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:27:52 backup_nas kernel: [87653.272997] sd 2:0:0:0: [sdc] Sense not available.
Mar  7 18:27:52 backup_nas kernel: [87653.273026] sd 2:0:0:0: [sdc] 0 512-byte logical blocks: (0 B/0 B)
Mar  7 18:27:52 backup_nas kernel: [87653.273028] sd 2:0:0:0: [sdc] 4096-byte physical blocks
Mar  7 18:27:52 backup_nas kernel: [87653.273043] sd 2:0:0:0: [sdc] 0 512-byte logical blocks: (0 B/0 B)
Mar  7 18:27:52 backup_nas kernel: [87653.273045] sd 2:0:0:0: [sdc] 4096-byte physical blocks
Mar  7 18:27:52 backup_nas kernel: [87653.273053] sd 2:0:0:0: [sdc] Write Protect is off
Mar  7 18:27:52 backup_nas kernel: [87653.273055] sd 2:0:0:0: [sdc] Mode Sense: ad 11 85 87
Mar  7 18:27:52 backup_nas kernel: [87653.273056] sd 2:0:0:0: [sdc] Write Protect is off
Mar  7 18:27:52 backup_nas kernel: [87653.273058] sd 2:0:0:0: [sdc] Mode Sense: 00 00 00 00
Mar  7 18:27:52 backup_nas kernel: [87653.273066] sd 2:0:0:0: [sdc] Write Protect is on
Mar  7 18:27:52 backup_nas kernel: [87653.273067] sd 2:0:0:0: [sdc] Mode Sense: ad 11 85 87
Mar  7 18:27:52 backup_nas kernel: [87653.273078] sd 2:0:0:0: [sdc] Write Protect is off
Mar  7 18:27:52 backup_nas kernel: [87653.273080] sd 2:0:0:0: [sdc] Mode Sense: 00 00 00 00
Mar  7 18:27:53 backup_nas kernel: [87653.861010] sd 2:0:0:0: [sdc] Read Capacity(16) failed: Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:27:53 backup_nas kernel: [87653.861014] sd 2:0:0:0: [sdc] Sense not available.
Mar  7 18:27:53 backup_nas kernel: [87653.861065] sd 2:0:0:0: [sdc] Read Capacity(10) failed: Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:27:53 backup_nas kernel: [87653.861068] sd 2:0:0:0: [sdc] Sense not available.
Mar  7 18:35:22 backup_nas kernel: [88103.054317] ata2.00: exception Emask 0x0 SAct 0x600 SErr 0x0 action 0x6 frozen
Mar  7 18:35:22 backup_nas kernel: [88103.054379] ata2.00: failed command: WRITE FPDMA QUEUED
Mar  7 18:35:22 backup_nas kernel: [88103.054422] ata2.00: cmd 61/08:48:c8:83:24/00:00:72:00:00/40 tag 9 ncq dma 4096 out
Mar  7 18:35:22 backup_nas kernel: [88103.054422]          res 40/00:01:01:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
Mar  7 18:35:22 backup_nas kernel: [88103.054518] ata2.00: status: { DRDY }
Mar  7 18:35:22 backup_nas kernel: [88103.054546] ata2.00: failed command: WRITE FPDMA QUEUED
Mar  7 18:35:22 backup_nas kernel: [88103.054589] ata2.00: cmd 61/28:50:d0:83:24/00:00:72:00:00/40 tag 10 ncq dma 20480 out
Mar  7 18:35:22 backup_nas kernel: [88103.054589]          res 40/00:01:01:4f:c2/00:00:00:00:00/00 Emask 0x4 (timeout)
Mar  7 18:35:22 backup_nas kernel: [88103.054685] ata2.00: status: { DRDY }
Mar  7 18:35:22 backup_nas kernel: [88103.054715] ata2: hard resetting link
Mar  7 18:35:27 backup_nas kernel: [88108.406281] ata2: link is slow to respond, please be patient (ready=0)
Mar  7 18:35:32 backup_nas kernel: [88113.086253] ata2: COMRESET failed (errno=-16)
Mar  7 18:35:32 backup_nas kernel: [88113.086298] ata2: hard resetting link
Mar  7 18:35:37 backup_nas kernel: [88118.438221] ata2: link is slow to respond, please be patient (ready=0)
Mar  7 18:35:42 backup_nas kernel: [88123.118193] ata2: COMRESET failed (errno=-16)
Mar  7 18:35:42 backup_nas kernel: [88123.118237] ata2: hard resetting link
Mar  7 18:35:47 backup_nas kernel: [88128.470161] ata2: link is slow to respond, please be patient (ready=0)
Mar  7 18:36:17 backup_nas kernel: [88158.169981] ata2: COMRESET failed (errno=-16)
Mar  7 18:36:17 backup_nas kernel: [88158.170026] ata2: limiting SATA link speed to 3.0 Gbps
Mar  7 18:36:17 backup_nas kernel: [88158.170028] ata2: hard resetting link
Mar  7 18:36:22 backup_nas kernel: [88163.221950] ata2: COMRESET failed (errno=-16)
Mar  7 18:36:22 backup_nas kernel: [88163.221995] ata2: reset failed, giving up
Mar  7 18:36:22 backup_nas kernel: [88163.222027] ata2.00: disabled
Mar  7 18:36:22 backup_nas kernel: [88163.222046] sd 1:0:0:0: [sdb] tag#9 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Mar  7 18:36:22 backup_nas kernel: [88163.222050] sd 1:0:0:0: [sdb] tag#9 Sense Key : Not Ready [current] 
Mar  7 18:36:22 backup_nas kernel: [88163.222053] sd 1:0:0:0: [sdb] tag#9 Add. Sense: Logical unit not ready, hard reset required
Mar  7 18:36:22 backup_nas kernel: [88163.222057] sd 1:0:0:0: [sdb] tag#9 CDB: Write(16) 8a 00 00 00 00 00 72 24 83 c8 00 00 00 08 00 00
Mar  7 18:36:22 backup_nas kernel: [88163.222060] print_req_error: I/O error, dev sdb, sector 1914995656
Mar  7 18:36:22 backup_nas kernel: [88163.222129] sd 1:0:0:0: [sdb] tag#10 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Mar  7 18:36:22 backup_nas kernel: [88163.222133] sd 1:0:0:0: [sdb] tag#10 Sense Key : Not Ready [current] 
Mar  7 18:36:22 backup_nas kernel: [88163.222136] sd 1:0:0:0: [sdb] tag#10 Add. Sense: Logical unit not ready, hard reset required
Mar  7 18:36:22 backup_nas kernel: [88163.222140] sd 1:0:0:0: [sdb] tag#10 CDB: Write(16) 8a 00 00 00 00 00 72 24 83 d0 00 00 00 28 00 00
Mar  7 18:36:22 backup_nas kernel: [88163.222142] print_req_error: I/O error, dev sdb, sector 1914995664
Mar  7 18:36:22 backup_nas kernel: [88163.222211] ata2: EH complete
Mar  7 18:36:22 backup_nas kernel: [88163.222232] sd 1:0:0:0: [sdb] tag#13 FAILED Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:36:22 backup_nas kernel: [88163.222236] sd 1:0:0:0: [sdb] tag#13 CDB: Write(16) 8a 00 00 00 00 00 bc 03 4a 80 00 00 00 60 00 00
Mar  7 18:36:22 backup_nas kernel: [88163.222238] print_req_error: I/O error, dev sdb, sector 3154332288
Mar  7 18:36:22 backup_nas kernel: [88163.222297] sd 1:0:0:0: [sdb] tag#14 FAILED Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:36:22 backup_nas kernel: [88163.222301] sd 1:0:0:0: [sdb] tag#14 CDB: Write(16) 8a 00 00 00 00 01 08 00 96 e0 00 00 00 60 00 00
Mar  7 18:36:22 backup_nas kernel: [88163.222304] print_req_error: I/O error, dev sdb, sector 4429223648
Mar  7 18:36:22 backup_nas kernel: [88163.222384] sd 1:0:0:0: [sdb] tag#15 FAILED Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:36:22 backup_nas kernel: [88163.222389] sd 1:0:0:0: [sdb] tag#15 CDB: Write(16) 8a 00 00 00 00 00 72 24 83 a0 00 00 00 28 00 00
Mar  7 18:36:22 backup_nas kernel: [88163.222400] print_req_error: I/O error, dev sdb, sector 1914995616
Mar  7 18:36:22 backup_nas kernel: [88163.222412] sd 1:0:0:0: [sdb] Read Capacity(16) failed: Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:36:22 backup_nas kernel: [88163.222414] sd 1:0:0:0: [sdb] Sense not available.
Mar  7 18:36:22 backup_nas kernel: [88163.222421] sd 1:0:0:0: [sdb] Read Capacity(16) failed: Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:36:22 backup_nas kernel: [88163.222422] sd 1:0:0:0: [sdb] Sense not available.
Mar  7 18:36:22 backup_nas kernel: [88163.222447] sd 1:0:0:0: [sdb] Read Capacity(10) failed: Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:36:22 backup_nas kernel: [88163.222448] sd 1:0:0:0: [sdb] Read Capacity(16) failed: Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:36:22 backup_nas kernel: [88163.222450] sd 1:0:0:0: [sdb] Sense not available.
Mar  7 18:36:22 backup_nas kernel: [88163.222450] sd 1:0:0:0: [sdb] Sense not available.
Mar  7 18:36:22 backup_nas kernel: [88163.222456] sd 1:0:0:0: [sdb] Read Capacity(10) failed: Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:36:22 backup_nas kernel: [88163.222458] sd 1:0:0:0: [sdb] Sense not available.
Mar  7 18:36:22 backup_nas kernel: [88163.222477] sd 1:0:0:0: [sdb] 0 512-byte logical blocks: (0 B/0 B)
Mar  7 18:36:22 backup_nas kernel: [88163.222479] sd 1:0:0:0: [sdb] 4096-byte physical blocks
Mar  7 18:36:22 backup_nas kernel: [88163.222484] sd 1:0:0:0: [sdb] 0 512-byte logical blocks: (0 B/0 B)
Mar  7 18:36:22 backup_nas kernel: [88163.222486] sd 1:0:0:0: [sdb] Read Capacity(10) failed: Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:36:22 backup_nas kernel: [88163.222487] sd 1:0:0:0: [sdb] 4096-byte physical blocks
Mar  7 18:36:22 backup_nas kernel: [88163.222488] sd 1:0:0:0: [sdb] Sense not available.
Mar  7 18:36:22 backup_nas kernel: [88163.222512] sd 1:0:0:0: [sdb] 0 512-byte logical blocks: (0 B/0 B)
Mar  7 18:36:22 backup_nas kernel: [88163.222514] sd 1:0:0:0: [sdb] 4096-byte physical blocks
Mar  7 18:36:22 backup_nas kernel: [88163.222523] sd 1:0:0:0: [sdb] Write Protect is on
Mar  7 18:36:22 backup_nas kernel: [88163.222525] sd 1:0:0:0: [sdb] Mode Sense: f8 50 83 a2
Mar  7 18:36:22 backup_nas kernel: [88163.222540] sd 1:0:0:0: [sdb] Read Capacity(16) failed: Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:36:22 backup_nas kernel: [88163.222542] sd 1:0:0:0: [sdb] Sense not available.
Mar  7 18:36:22 backup_nas kernel: [88163.222558] sd 1:0:0:0: [sdb] Read Capacity(16) failed: Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:36:22 backup_nas kernel: [88163.222559] sd 1:0:0:0: [sdb] Sense not available.
Mar  7 18:36:22 backup_nas kernel: [88163.222599] sd 1:0:0:0: [sdb] Read Capacity(10) failed: Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:36:22 backup_nas kernel: [88163.222600] sd 1:0:0:0: [sdb] Sense not available.
Mar  7 18:36:22 backup_nas kernel: [88163.222611] sd 1:0:0:0: [sdb] Read Capacity(10) failed: Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:36:22 backup_nas kernel: [88163.222613] sd 1:0:0:0: [sdb] Sense not available.
Mar  7 18:36:22 backup_nas kernel: [88163.222697] sd 1:0:0:0: [sdb] Write Protect is off
Mar  7 18:36:22 backup_nas kernel: [88163.222699] sd 1:0:0:0: [sdb] Mode Sense: 89 fb 92 18
Mar  7 18:36:22 backup_nas kernel: [88163.222722] sd 1:0:0:0: [sdb] Write Protect is off
Mar  7 18:36:22 backup_nas kernel: [88163.222724] sd 1:0:0:0: [sdb] Mode Sense: 89 fb 92 18
Mar  7 18:36:22 backup_nas kernel: [88163.223745] WARNING: Pool 'backups' has encountered an uncorrectable I/O failure and has been suspended.
Mar  7 18:36:22 backup_nas kernel: [88163.223745] 
Mar  7 18:37:06 backup_nas kernel: [88207.469682] INFO: task txg_sync:973 blocked for more than 120 seconds.
Mar  7 18:37:06 backup_nas kernel: [88207.469738]       Tainted: P           OE    4.15.0-45-generic #48-Ubuntu
Mar  7 18:37:06 backup_nas kernel: [88207.469784] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar  7 18:37:06 backup_nas kernel: [88207.469836] txg_sync        D    0   973      2 0x80000000
Mar  7 18:37:06 backup_nas kernel: [88207.469840] Call Trace:
Mar  7 18:37:06 backup_nas kernel: [88207.469850]  __schedule+0x291/0x8a0
Mar  7 18:37:06 backup_nas kernel: [88207.469853]  schedule+0x2c/0x80
Mar  7 18:37:06 backup_nas kernel: [88207.469857]  io_schedule+0x16/0x40
Mar  7 18:37:06 backup_nas kernel: [88207.469869]  cv_wait_common+0xb2/0x140 [spl]
Mar  7 18:37:06 backup_nas kernel: [88207.469873]  ? wait_woken+0x80/0x80
Mar  7 18:37:06 backup_nas kernel: [88207.469880]  __cv_wait_io+0x18/0x20 [spl]
Mar  7 18:37:06 backup_nas kernel: [88207.469941]  zio_wait+0x102/0x1b0 [zfs]
Mar  7 18:37:06 backup_nas kernel: [88207.469988]  dsl_pool_sync+0x3d5/0x420 [zfs]
Mar  7 18:37:06 backup_nas kernel: [88207.470037]  spa_sync+0x43e/0xd30 [zfs]
Mar  7 18:37:06 backup_nas kernel: [88207.470088]  txg_sync_thread+0x2cd/0x4a0 [zfs]
Mar  7 18:37:06 backup_nas kernel: [88207.470092]  ? __switch_to_asm+0x40/0x70
Mar  7 18:37:06 backup_nas kernel: [88207.470139]  ? txg_quiesce_thread+0x3d0/0x3d0 [zfs]
Mar  7 18:37:06 backup_nas kernel: [88207.470145]  thread_generic_wrapper+0x74/0x90 [spl]
Mar  7 18:37:06 backup_nas kernel: [88207.470150]  kthread+0x121/0x140
Mar  7 18:37:06 backup_nas kernel: [88207.470156]  ? __thread_exit+0x20/0x20 [spl]
Mar  7 18:37:06 backup_nas kernel: [88207.470159]  ? kthread_create_worker_on_cpu+0x70/0x70
Mar  7 18:37:06 backup_nas kernel: [88207.470163]  ? kthread_create_worker_on_cpu+0x70/0x70
Mar  7 18:37:06 backup_nas kernel: [88207.470166]  ret_from_fork+0x35/0x40
Mar  7 18:37:06 backup_nas kernel: [88207.470178] INFO: task zfs:23211 blocked for more than 120 seconds.
Mar  7 18:37:06 backup_nas kernel: [88207.470222]       Tainted: P           OE    4.15.0-45-generic #48-Ubuntu
Mar  7 18:37:06 backup_nas kernel: [88207.470267] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar  7 18:37:06 backup_nas kernel: [88207.470319] zfs             D    0 23211  23109 0x80000000
Mar  7 18:37:06 backup_nas kernel: [88207.470321] Call Trace:
Mar  7 18:37:06 backup_nas kernel: [88207.470324]  __schedule+0x291/0x8a0
Mar  7 18:37:06 backup_nas kernel: [88207.470331]  ? vn_rdwr+0x97/0xc0 [spl]
Mar  7 18:37:06 backup_nas kernel: [88207.470334]  schedule+0x2c/0x80
Mar  7 18:37:06 backup_nas kernel: [88207.470341]  cv_wait_common+0x11e/0x140 [spl]
Mar  7 18:37:06 backup_nas kernel: [88207.470344]  ? wait_woken+0x80/0x80
Mar  7 18:37:06 backup_nas kernel: [88207.470350]  __cv_wait+0x15/0x20 [spl]
Mar  7 18:37:06 backup_nas kernel: [88207.470385]  bqueue_enqueue+0x62/0xe0 [zfs]
Mar  7 18:37:06 backup_nas kernel: [88207.470424]  dmu_recv_stream+0x648/0xe80 [zfs]
Mar  7 18:37:06 backup_nas kernel: [88207.470461]  ? dmu_recv_begin+0x134/0x1c0 [zfs]
Mar  7 18:37:06 backup_nas kernel: [88207.470512]  zfs_ioc_recv_impl+0x306/0x1100 [zfs]
Mar  7 18:37:06 backup_nas kernel: [88207.470516]  ? select_idle_sibling+0x383/0x410
Mar  7 18:37:06 backup_nas kernel: [88207.470520]  ? enqueue_task_fair+0xa1/0x7f0
Mar  7 18:37:06 backup_nas kernel: [88207.470523]  ? __update_load_avg_blocked_se.isra.37+0xd1/0x150
Mar  7 18:37:06 backup_nas kernel: [88207.470573]  zfs_ioc_recv+0x1e9/0x330 [zfs]
Mar  7 18:37:06 backup_nas kernel: [88207.470579]  ? security_capable+0x4e/0x70
Mar  7 18:37:06 backup_nas kernel: [88207.470584]  ? ns_capable_common+0x68/0x80
Mar  7 18:37:06 backup_nas kernel: [88207.470587]  ? capable+0x1c/0x20
Mar  7 18:37:06 backup_nas kernel: [88207.470633]  ? priv_policy.isra.3.part.4+0x11/0x20 [zfs]
Mar  7 18:37:06 backup_nas kernel: [88207.470676]  ? secpolicy_zinject+0x3a/0x40 [zfs]
Mar  7 18:37:06 backup_nas kernel: [88207.470679]  ? _cond_resched+0x19/0x40
Mar  7 18:37:06 backup_nas kernel: [88207.470682]  ? __kmalloc+0x19b/0x220
Mar  7 18:37:06 backup_nas kernel: [88207.470688]  ? strdup+0x45/0x70 [spl]
Mar  7 18:37:06 backup_nas kernel: [88207.470737]  zfsdev_ioctl+0x1e0/0x610 [zfs]
Mar  7 18:37:06 backup_nas kernel: [88207.470741]  do_vfs_ioctl+0xa8/0x630
Mar  7 18:37:06 backup_nas kernel: [88207.470745]  ? handle_mm_fault+0xb1/0x1f0
Mar  7 18:37:06 backup_nas kernel: [88207.470749]  ? __do_page_fault+0x270/0x4d0
Mar  7 18:37:06 backup_nas kernel: [88207.470751]  ? vfs_read+0x8e/0x130
Mar  7 18:37:06 backup_nas kernel: [88207.470755]  SyS_ioctl+0x79/0x90
Mar  7 18:37:06 backup_nas kernel: [88207.470759]  do_syscall_64+0x73/0x130
Mar  7 18:37:06 backup_nas kernel: [88207.470763]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
Mar  7 18:37:06 backup_nas kernel: [88207.470766] RIP: 0033:0x7f2f61aa35d7
Mar  7 18:37:06 backup_nas kernel: [88207.470768] RSP: 002b:00007ffd2a0e3fa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
Mar  7 18:37:06 backup_nas kernel: [88207.470770] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2f61aa35d7
Mar  7 18:37:06 backup_nas kernel: [88207.470772] RDX: 00007ffd2a0e4140 RSI: 0000000000005a1b RDI: 0000000000000005
Mar  7 18:37:06 backup_nas kernel: [88207.470773] RBP: 00007ffd2a0e4140 R08: 00007f2f61d78d90 R09: 0000000000000000
Mar  7 18:37:06 backup_nas kernel: [88207.470775] R10: 00005581aa384010 R11: 0000000000000246 R12: 00007ffd2a0f13e8
Mar  7 18:37:06 backup_nas kernel: [88207.470776] R13: 00007ffd2a0ee430 R14: 00007ffd2a0ebe30 R15: 0000000000000000
Mar  7 18:37:06 backup_nas kernel: [88207.470779] INFO: task receive_writer:23239 blocked for more than 120 seconds.
Mar  7 18:37:06 backup_nas kernel: [88207.470829]       Tainted: P           OE    4.15.0-45-generic #48-Ubuntu
Mar  7 18:37:06 backup_nas kernel: [88207.470874] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar  7 18:37:06 backup_nas kernel: [88207.470926] receive_writer  D    0 23239      2 0x80000000
Mar  7 18:37:06 backup_nas kernel: [88207.470928] Call Trace:
Mar  7 18:37:06 backup_nas kernel: [88207.470931]  __schedule+0x291/0x8a0
Mar  7 18:37:06 backup_nas kernel: [88207.470934]  schedule+0x2c/0x80
Mar  7 18:37:06 backup_nas kernel: [88207.470941]  cv_wait_common+0x11e/0x140 [spl]
Mar  7 18:37:06 backup_nas kernel: [88207.470944]  ? wait_woken+0x80/0x80
Mar  7 18:37:06 backup_nas kernel: [88207.470951]  __cv_wait+0x15/0x20 [spl]
Mar  7 18:37:06 backup_nas kernel: [88207.470989]  dmu_tx_wait+0xb2/0x3a0 [zfs]
Mar  7 18:37:06 backup_nas kernel: [88207.471026]  dmu_tx_assign+0x72/0x440 [zfs]
Mar  7 18:37:06 backup_nas kernel: [88207.471062]  receive_write+0xcf/0x270 [zfs]
Mar  7 18:37:06 backup_nas kernel: [88207.471069]  ? __cv_signal+0x2d/0x40 [spl]
Mar  7 18:37:06 backup_nas kernel: [88207.471103]  receive_writer_thread+0x535/0x9e0 [zfs]
Mar  7 18:37:06 backup_nas kernel: [88207.471107]  ? set_curr_task_fair+0x2b/0x60
Mar  7 18:37:06 backup_nas kernel: [88207.471113]  ? spl_kmem_free+0x33/0x40 [spl]
Mar  7 18:37:06 backup_nas kernel: [88207.471115]  ? kfree+0x165/0x180
Mar  7 18:37:06 backup_nas kernel: [88207.471148]  ? receive_free.isra.13+0xc0/0xc0 [zfs]
Mar  7 18:37:06 backup_nas kernel: [88207.471155]  thread_generic_wrapper+0x74/0x90 [spl]
Mar  7 18:37:06 backup_nas kernel: [88207.471158]  kthread+0x121/0x140
Mar  7 18:37:06 backup_nas kernel: [88207.471164]  ? __thread_exit+0x20/0x20 [spl]
Mar  7 18:37:06 backup_nas kernel: [88207.471167]  ? kthread_create_worker_on_cpu+0x70/0x70
Mar  7 18:37:06 backup_nas kernel: [88207.471171]  ret_from_fork+0x35/0x40
Mar  7 18:37:47 backup_nas kernel: [88248.344231] sd 1:0:0:0: [sdb] tag#5 FAILED Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:37:47 backup_nas kernel: [88248.344245] sd 1:0:0:0: [sdb] tag#5 CDB: ATA command pass through(16) 85 06 2c 00 00 00 00 00 00 00 00 00 00 00 e5 00
Mar  7 18:37:47 backup_nas kernel: [88248.344480] sd 2:0:0:0: [sdc] tag#24 FAILED Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 18:37:47 backup_nas kernel: [88248.344484] sd 2:0:0:0: [sdc] tag#24 CDB: ATA command pass through(16) 85 06 2c 00 00 00 00 00 00 00 00 00 00 00 e5 00
Mar  7 18:39:07 backup_nas kernel: [88328.300849] INFO: task txg_sync:973 blocked for more than 120 seconds.
Mar  7 18:39:07 backup_nas kernel: [88328.300898]       Tainted: P           OE    4.15.0-45-generic #48-Ubuntu
Mar  7 18:39:07 backup_nas kernel: [88328.300929] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar  7 18:39:07 backup_nas kernel: [88328.300964] txg_sync        D    0   973      2 0x80000000
Mar  7 18:39:07 backup_nas kernel: [88328.300967] Call Trace:
Mar  7 18:39:07 backup_nas kernel: [88328.300974]  __schedule+0x291/0x8a0
Mar  7 18:39:07 backup_nas kernel: [88328.300977]  schedule+0x2c/0x80
Mar  7 18:39:07 backup_nas kernel: [88328.300980]  io_schedule+0x16/0x40
Mar  7 18:39:07 backup_nas kernel: [88328.300988]  cv_wait_common+0xb2/0x140 [spl]
Mar  7 18:39:07 backup_nas kernel: [88328.300991]  ? wait_woken+0x80/0x80
Mar  7 18:39:07 backup_nas kernel: [88328.300996]  __cv_wait_io+0x18/0x20 [spl]
Mar  7 18:39:07 backup_nas kernel: [88328.301040]  zio_wait+0x102/0x1b0 [zfs]
Mar  7 18:39:07 backup_nas kernel: [88328.301071]  dsl_pool_sync+0x3d5/0x420 [zfs]
Mar  7 18:39:07 backup_nas kernel: [88328.301104]  spa_sync+0x43e/0xd30 [zfs]
Mar  7 18:39:07 backup_nas kernel: [88328.301138]  txg_sync_thread+0x2cd/0x4a0 [zfs]
Mar  7 18:39:07 backup_nas kernel: [88328.301141]  ? __switch_to_asm+0x40/0x70
Mar  7 18:39:07 backup_nas kernel: [88328.301172]  ? txg_quiesce_thread+0x3d0/0x3d0 [zfs]
Mar  7 18:39:07 backup_nas kernel: [88328.301176]  thread_generic_wrapper+0x74/0x90 [spl]
Mar  7 18:39:07 backup_nas kernel: [88328.301180]  kthread+0x121/0x140
Mar  7 18:39:07 backup_nas kernel: [88328.301183]  ? __thread_exit+0x20/0x20 [spl]
Mar  7 18:39:07 backup_nas kernel: [88328.301186]  ? kthread_create_worker_on_cpu+0x70/0x70
Mar  7 18:39:07 backup_nas kernel: [88328.301188]  ? kthread_create_worker_on_cpu+0x70/0x70
Mar  7 18:39:07 backup_nas kernel: [88328.301190]  ret_from_fork+0x35/0x40
Mar  7 18:39:07 backup_nas kernel: [88328.301199] INFO: task zfs:23211 blocked for more than 120 seconds.
Mar  7 18:39:07 backup_nas kernel: [88328.301229]       Tainted: P           OE    4.15.0-45-generic #48-Ubuntu
Mar  7 18:39:07 backup_nas kernel: [88328.301259] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar  7 18:39:07 backup_nas kernel: [88328.301294] zfs             D    0 23211  23109 0x80000000
Mar  7 18:39:07 backup_nas kernel: [88328.301296] Call Trace:
Mar  7 18:39:07 backup_nas kernel: [88328.301298]  __schedule+0x291/0x8a0
Mar  7 18:39:07 backup_nas kernel: [88328.301302]  ? vn_rdwr+0x97/0xc0 [spl]
Mar  7 18:39:07 backup_nas kernel: [88328.301304]  schedule+0x2c/0x80
Mar  7 18:39:07 backup_nas kernel: [88328.301309]  cv_wait_common+0x11e/0x140 [spl]
Mar  7 18:39:07 backup_nas kernel: [88328.301311]  ? wait_woken+0x80/0x80
Mar  7 18:39:07 backup_nas kernel: [88328.301315]  __cv_wait+0x15/0x20 [spl]
Mar  7 18:39:07 backup_nas kernel: [88328.301339]  bqueue_enqueue+0x62/0xe0 [zfs]
Mar  7 18:39:07 backup_nas kernel: [88328.301365]  dmu_recv_stream+0x648/0xe80 [zfs]
Mar  7 18:39:07 backup_nas kernel: [88328.301389]  ? dmu_recv_begin+0x134/0x1c0 [zfs]
Mar  7 18:39:07 backup_nas kernel: [88328.301423]  zfs_ioc_recv_impl+0x306/0x1100 [zfs]
Mar  7 18:39:07 backup_nas kernel: [88328.301426]  ? select_idle_sibling+0x383/0x410
Mar  7 18:39:07 backup_nas kernel: [88328.301428]  ? enqueue_task_fair+0xa1/0x7f0
Mar  7 18:39:07 backup_nas kernel: [88328.301430]  ? __update_load_avg_blocked_se.isra.37+0xd1/0x150
Mar  7 18:39:07 backup_nas kernel: [88328.301464]  zfs_ioc_recv+0x1e9/0x330 [zfs]
Mar  7 18:39:07 backup_nas kernel: [88328.301468]  ? security_capable+0x4e/0x70
Mar  7 18:39:07 backup_nas kernel: [88328.301471]  ? ns_capable_common+0x68/0x80
Mar  7 18:39:07 backup_nas kernel: [88328.301473]  ? capable+0x1c/0x20
Mar  7 18:39:07 backup_nas kernel: [88328.301503]  ? priv_policy.isra.3.part.4+0x11/0x20 [zfs]
Mar  7 18:39:07 backup_nas kernel: [88328.301532]  ? secpolicy_zinject+0x3a/0x40 [zfs]
Mar  7 18:39:07 backup_nas kernel: [88328.301534]  ? _cond_resched+0x19/0x40
Mar  7 18:39:07 backup_nas kernel: [88328.301537]  ? __kmalloc+0x19b/0x220
Mar  7 18:39:07 backup_nas kernel: [88328.301540]  ? strdup+0x45/0x70 [spl]
Mar  7 18:39:07 backup_nas kernel: [88328.301573]  zfsdev_ioctl+0x1e0/0x610 [zfs]
Mar  7 18:39:07 backup_nas kernel: [88328.301576]  do_vfs_ioctl+0xa8/0x630
Mar  7 18:39:07 backup_nas kernel: [88328.301578]  ? handle_mm_fault+0xb1/0x1f0
Mar  7 18:39:07 backup_nas kernel: [88328.301581]  ? __do_page_fault+0x270/0x4d0
Mar  7 18:39:07 backup_nas kernel: [88328.301582]  ? vfs_read+0x8e/0x130
Mar  7 18:39:07 backup_nas kernel: [88328.301584]  SyS_ioctl+0x79/0x90
Mar  7 18:39:07 backup_nas kernel: [88328.301587]  do_syscall_64+0x73/0x130
Mar  7 18:39:07 backup_nas kernel: [88328.301590]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
Mar  7 18:39:07 backup_nas kernel: [88328.301592] RIP: 0033:0x7f2f61aa35d7
Mar  7 18:39:07 backup_nas kernel: [88328.301593] RSP: 002b:00007ffd2a0e3fa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
Mar  7 18:39:07 backup_nas kernel: [88328.301594] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2f61aa35d7
Mar  7 18:39:07 backup_nas kernel: [88328.301595] RDX: 00007ffd2a0e4140 RSI: 0000000000005a1b RDI: 0000000000000005
Mar  7 18:39:07 backup_nas kernel: [88328.301596] RBP: 00007ffd2a0e4140 R08: 00007f2f61d78d90 R09: 0000000000000000
Mar  7 18:39:07 backup_nas kernel: [88328.301597] R10: 00005581aa384010 R11: 0000000000000246 R12: 00007ffd2a0f13e8
Mar  7 18:39:07 backup_nas kernel: [88328.301598] R13: 00007ffd2a0ee430 R14: 00007ffd2a0ebe30 R15: 0000000000000000
Mar  7 18:39:07 backup_nas kernel: [88328.301600] INFO: task receive_writer:23239 blocked for more than 120 seconds.
Mar  7 18:39:07 backup_nas kernel: [88328.301634]       Tainted: P           OE    4.15.0-45-generic #48-Ubuntu
Mar  7 18:39:07 backup_nas kernel: [88328.301664] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar  7 18:39:07 backup_nas kernel: [88328.301699] receive_writer  D    0 23239      2 0x80000000
Mar  7 18:39:07 backup_nas kernel: [88328.301700] Call Trace:
Mar  7 18:39:07 backup_nas kernel: [88328.301702]  __schedule+0x291/0x8a0
Mar  7 18:39:07 backup_nas kernel: [88328.301704]  schedule+0x2c/0x80
Mar  7 18:39:07 backup_nas kernel: [88328.301709]  cv_wait_common+0x11e/0x140 [spl]
Mar  7 18:39:07 backup_nas kernel: [88328.301711]  ? wait_woken+0x80/0x80
Mar  7 18:39:07 backup_nas kernel: [88328.301715]  __cv_wait+0x15/0x20 [spl]
Mar  7 18:39:07 backup_nas kernel: [88328.301741]  dmu_tx_wait+0xb2/0x3a0 [zfs]
Mar  7 18:39:07 backup_nas kernel: [88328.301765]  dmu_tx_assign+0x72/0x440 [zfs]
Mar  7 18:39:07 backup_nas kernel: [88328.301790]  receive_write+0xcf/0x270 [zfs]
Mar  7 18:39:07 backup_nas kernel: [88328.301794]  ? __cv_signal+0x2d/0x40 [spl]
Mar  7 18:39:07 backup_nas kernel: [88328.301818]  receive_writer_thread+0x535/0x9e0 [zfs]
Mar  7 18:39:07 backup_nas kernel: [88328.301820]  ? set_curr_task_fair+0x2b/0x60
Mar  7 18:39:07 backup_nas kernel: [88328.301824]  ? spl_kmem_free+0x33/0x40 [spl]
Mar  7 18:39:07 backup_nas kernel: [88328.301826]  ? kfree+0x165/0x180
Mar  7 18:39:07 backup_nas kernel: [88328.301849]  ? receive_free.isra.13+0xc0/0xc0 [zfs]
Mar  7 18:39:07 backup_nas kernel: [88328.301853]  thread_generic_wrapper+0x74/0x90 [spl]
Mar  7 18:39:07 backup_nas kernel: [88328.301855]  kthread+0x121/0x140
Mar  7 18:39:07 backup_nas kernel: [88328.301859]  ? __thread_exit+0x20/0x20 [spl]
Mar  7 18:39:07 backup_nas kernel: [88328.301861]  ? kthread_create_worker_on_cpu+0x70/0x70
Mar  7 18:39:07 backup_nas kernel: [88328.301863]  ret_from_fork+0x35/0x40
Mar  7 18:41:08 backup_nas kernel: [88449.131935] INFO: task txg_sync:973 blocked for more than 120 seconds.
Mar  7 18:41:08 backup_nas kernel: [88449.131985]       Tainted: P           OE    4.15.0-45-generic #48-Ubuntu
Mar  7 18:41:08 backup_nas kernel: [88449.132015] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar  7 18:41:08 backup_nas kernel: [88449.132051] txg_sync        D    0   973      2 0x80000000
Mar  7 18:41:08 backup_nas kernel: [88449.132053] Call Trace:
Mar  7 18:41:08 backup_nas kernel: [88449.132061]  __schedule+0x291/0x8a0
Mar  7 18:41:08 backup_nas kernel: [88449.132063]  schedule+0x2c/0x80
Mar  7 18:41:08 backup_nas kernel: [88449.132066]  io_schedule+0x16/0x40
Mar  7 18:41:08 backup_nas kernel: [88449.132074]  cv_wait_common+0xb2/0x140 [spl]
Mar  7 18:41:08 backup_nas kernel: [88449.132077]  ? wait_woken+0x80/0x80
Mar  7 18:41:08 backup_nas kernel: [88449.132082]  __cv_wait_io+0x18/0x20 [spl]
Mar  7 18:41:08 backup_nas kernel: [88449.132126]  zio_wait+0x102/0x1b0 [zfs]
Mar  7 18:41:08 backup_nas kernel: [88449.132157]  dsl_pool_sync+0x3d5/0x420 [zfs]
Mar  7 18:41:08 backup_nas kernel: [88449.132190]  spa_sync+0x43e/0xd30 [zfs]
Mar  7 18:41:08 backup_nas kernel: [88449.132224]  txg_sync_thread+0x2cd/0x4a0 [zfs]
Mar  7 18:41:08 backup_nas kernel: [88449.132227]  ? __switch_to_asm+0x40/0x70
Mar  7 18:41:08 backup_nas kernel: [88449.132259]  ? txg_quiesce_thread+0x3d0/0x3d0 [zfs]
Mar  7 18:41:08 backup_nas kernel: [88449.132263]  thread_generic_wrapper+0x74/0x90 [spl]
Mar  7 18:41:08 backup_nas kernel: [88449.132267]  kthread+0x121/0x140
Mar  7 18:41:08 backup_nas kernel: [88449.132270]  ? __thread_exit+0x20/0x20 [spl]
Mar  7 18:41:08 backup_nas kernel: [88449.132273]  ? kthread_create_worker_on_cpu+0x70/0x70
Mar  7 18:41:08 backup_nas kernel: [88449.132275]  ? kthread_create_worker_on_cpu+0x70/0x70
Mar  7 18:41:08 backup_nas kernel: [88449.132277]  ret_from_fork+0x35/0x40
Mar  7 18:41:08 backup_nas kernel: [88449.132285] INFO: task zfs:23211 blocked for more than 120 seconds.
Mar  7 18:41:08 backup_nas kernel: [88449.132315]       Tainted: P           OE    4.15.0-45-generic #48-Ubuntu
Mar  7 18:41:08 backup_nas kernel: [88449.133692] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar  7 18:41:08 backup_nas kernel: [88449.135084] zfs             D    0 23211  23109 0x80000000
Mar  7 18:41:08 backup_nas kernel: [88449.135086] Call Trace:
Mar  7 18:41:08 backup_nas kernel: [88449.135088]  __schedule+0x291/0x8a0
Mar  7 18:41:08 backup_nas kernel: [88449.135093]  ? vn_rdwr+0x97/0xc0 [spl]
Mar  7 18:41:08 backup_nas kernel: [88449.135095]  schedule+0x2c/0x80
Mar  7 18:41:08 backup_nas kernel: [88449.135099]  cv_wait_common+0x11e/0x140 [spl]
Mar  7 18:41:08 backup_nas kernel: [88449.135101]  ? wait_woken+0x80/0x80
Mar  7 18:41:08 backup_nas kernel: [88449.135105]  __cv_wait+0x15/0x20 [spl]
Mar  7 18:41:08 backup_nas kernel: [88449.135129]  bqueue_enqueue+0x62/0xe0 [zfs]
Mar  7 18:41:08 backup_nas kernel: [88449.135156]  dmu_recv_stream+0x648/0xe80 [zfs]
Mar  7 18:41:08 backup_nas kernel: [88449.135180]  ? dmu_recv_begin+0x134/0x1c0 [zfs]
Mar  7 18:41:08 backup_nas kernel: [88449.135215]  zfs_ioc_recv_impl+0x306/0x1100 [zfs]
Mar  7 18:41:08 backup_nas kernel: [88449.135217]  ? select_idle_sibling+0x383/0x410
Mar  7 18:41:08 backup_nas kernel: [88449.135220]  ? enqueue_task_fair+0xa1/0x7f0
Mar  7 18:41:08 backup_nas kernel: [88449.135222]  ? __update_load_avg_blocked_se.isra.37+0xd1/0x150
Mar  7 18:41:08 backup_nas kernel: [88449.135255]  zfs_ioc_recv+0x1e9/0x330 [zfs]
Mar  7 18:41:08 backup_nas kernel: [88449.135260]  ? security_capable+0x4e/0x70
Mar  7 18:41:08 backup_nas kernel: [88449.135263]  ? ns_capable_common+0x68/0x80
Mar  7 18:41:08 backup_nas kernel: [88449.135265]  ? capable+0x1c/0x20
Mar  7 18:41:08 backup_nas kernel: [88449.135296]  ? priv_policy.isra.3.part.4+0x11/0x20 [zfs]
Mar  7 18:41:08 backup_nas kernel: [88449.135326]  ? secpolicy_zinject+0x3a/0x40 [zfs]
Mar  7 18:41:08 backup_nas kernel: [88449.135328]  ? _cond_resched+0x19/0x40
Mar  7 18:41:08 backup_nas kernel: [88449.135330]  ? __kmalloc+0x19b/0x220
Mar  7 18:41:08 backup_nas kernel: [88449.135333]  ? strdup+0x45/0x70 [spl]
Mar  7 18:41:08 backup_nas kernel: [88449.135366]  zfsdev_ioctl+0x1e0/0x610 [zfs]
Mar  7 18:41:08 backup_nas kernel: [88449.135370]  do_vfs_ioctl+0xa8/0x630
Mar  7 18:41:08 backup_nas kernel: [88449.135372]  ? handle_mm_fault+0xb1/0x1f0
Mar  7 18:41:08 backup_nas kernel: [88449.135374]  ? __do_page_fault+0x270/0x4d0
Mar  7 18:41:08 backup_nas kernel: [88449.135376]  ? vfs_read+0x8e/0x130
Mar  7 18:41:08 backup_nas kernel: [88449.135378]  SyS_ioctl+0x79/0x90
Mar  7 18:41:08 backup_nas kernel: [88449.135381]  do_syscall_64+0x73/0x130
Mar  7 18:41:08 backup_nas kernel: [88449.135384]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
Mar  7 18:41:08 backup_nas kernel: [88449.135386] RIP: 0033:0x7f2f61aa35d7
Mar  7 18:41:08 backup_nas kernel: [88449.135387] RSP: 002b:00007ffd2a0e3fa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
Mar  7 18:41:08 backup_nas kernel: [88449.135389] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2f61aa35d7
Mar  7 18:41:08 backup_nas kernel: [88449.135390] RDX: 00007ffd2a0e4140 RSI: 0000000000005a1b RDI: 0000000000000005
Mar  7 18:41:08 backup_nas kernel: [88449.135390] RBP: 00007ffd2a0e4140 R08: 00007f2f61d78d90 R09: 0000000000000000
Mar  7 18:41:08 backup_nas kernel: [88449.135391] R10: 00005581aa384010 R11: 0000000000000246 R12: 00007ffd2a0f13e8
Mar  7 18:41:08 backup_nas kernel: [88449.135392] R13: 00007ffd2a0ee430 R14: 00007ffd2a0ebe30 R15: 0000000000000000
Mar  7 18:41:08 backup_nas kernel: [88449.135395] INFO: task receive_writer:23239 blocked for more than 120 seconds.
Mar  7 18:41:08 backup_nas kernel: [88449.136821]       Tainted: P           OE    4.15.0-45-generic #48-Ubuntu
Mar  7 18:41:08 backup_nas kernel: [88449.138344] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar  7 18:41:08 backup_nas kernel: [88449.139733] receive_writer  D    0 23239      2 0x80000000
Mar  7 18:41:08 backup_nas kernel: [88449.139735] Call Trace:
Mar  7 18:41:08 backup_nas kernel: [88449.139738]  __schedule+0x291/0x8a0
Mar  7 18:41:08 backup_nas kernel: [88449.139740]  schedule+0x2c/0x80
Mar  7 18:41:08 backup_nas kernel: [88449.139744]  cv_wait_common+0x11e/0x140 [spl]
Mar  7 18:41:08 backup_nas kernel: [88449.139746]  ? wait_woken+0x80/0x80
Mar  7 18:41:08 backup_nas kernel: [88449.139749]  __cv_wait+0x15/0x20 [spl]
Mar  7 18:41:08 backup_nas kernel: [88449.139772]  dmu_tx_wait+0xb2/0x3a0 [zfs]
Mar  7 18:41:08 backup_nas kernel: [88449.139790]  dmu_tx_assign+0x72/0x440 [zfs]
Mar  7 18:41:08 backup_nas kernel: [88449.139808]  receive_write+0xcf/0x270 [zfs]
Mar  7 18:41:08 backup_nas kernel: [88449.139812]  ? __cv_signal+0x2d/0x40 [spl]
Mar  7 18:41:08 backup_nas kernel: [88449.139829]  receive_writer_thread+0x535/0x9e0 [zfs]
Mar  7 18:41:08 backup_nas kernel: [88449.139830]  ? set_curr_task_fair+0x2b/0x60
Mar  7 18:41:08 backup_nas kernel: [88449.139833]  ? spl_kmem_free+0x33/0x40 [spl]
Mar  7 18:41:08 backup_nas kernel: [88449.139835]  ? kfree+0x165/0x180
Mar  7 18:41:08 backup_nas kernel: [88449.139852]  ? receive_free.isra.13+0xc0/0xc0 [zfs]
Mar  7 18:41:08 backup_nas kernel: [88449.139855]  thread_generic_wrapper+0x74/0x90 [spl]
Mar  7 18:41:08 backup_nas kernel: [88449.139857]  kthread+0x121/0x140
Mar  7 18:41:08 backup_nas kernel: [88449.139859]  ? __thread_exit+0x20/0x20 [spl]
Mar  7 18:41:08 backup_nas kernel: [88449.139861]  ? kthread_create_worker_on_cpu+0x70/0x70
Mar  7 18:41:08 backup_nas kernel: [88449.139863]  ret_from_fork+0x35/0x40
Mar  7 18:43:09 backup_nas kernel: [88569.962962] INFO: task txg_sync:973 blocked for more than 120 seconds.
Mar  7 18:43:09 backup_nas kernel: [88569.965098]       Tainted: P           OE    4.15.0-45-generic #48-Ubuntu
Mar  7 18:43:09 backup_nas kernel: [88569.967223] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar  7 18:43:09 backup_nas kernel: [88569.969450] txg_sync        D    0   973      2 0x80000000
Mar  7 18:43:09 backup_nas kernel: [88569.969454] Call Trace:
Mar  7 18:43:09 backup_nas kernel: [88569.969464]  __schedule+0x291/0x8a0
Mar  7 18:43:09 backup_nas kernel: [88569.969467]  schedule+0x2c/0x80
Mar  7 18:43:09 backup_nas kernel: [88569.969471]  io_schedule+0x16/0x40
Mar  7 18:43:09 backup_nas kernel: [88569.969482]  cv_wait_common+0xb2/0x140 [spl]
Mar  7 18:43:09 backup_nas kernel: [88569.969486]  ? wait_woken+0x80/0x80
Mar  7 18:43:09 backup_nas kernel: [88569.969493]  __cv_wait_io+0x18/0x20 [spl]
Mar  7 18:43:09 backup_nas kernel: [88569.969556]  zio_wait+0x102/0x1b0 [zfs]
Mar  7 18:43:09 backup_nas kernel: [88569.969603]  dsl_pool_sync+0x3d5/0x420 [zfs]
Mar  7 18:43:09 backup_nas kernel: [88569.969652]  spa_sync+0x43e/0xd30 [zfs]
Mar  7 18:43:09 backup_nas kernel: [88569.969703]  txg_sync_thread+0x2cd/0x4a0 [zfs]
Mar  7 18:43:09 backup_nas kernel: [88569.969707]  ? __switch_to_asm+0x40/0x70
Mar  7 18:43:09 backup_nas kernel: [88569.969753]  ? txg_quiesce_thread+0x3d0/0x3d0 [zfs]
Mar  7 18:43:09 backup_nas kernel: [88569.969759]  thread_generic_wrapper+0x74/0x90 [spl]
Mar  7 18:43:09 backup_nas kernel: [88569.969764]  kthread+0x121/0x140
Mar  7 18:43:09 backup_nas kernel: [88569.969769]  ? __thread_exit+0x20/0x20 [spl]
Mar  7 18:43:09 backup_nas kernel: [88569.969773]  ? kthread_create_worker_on_cpu+0x70/0x70
Mar  7 18:43:09 backup_nas kernel: [88569.969776]  ? kthread_create_worker_on_cpu+0x70/0x70
Mar  7 18:43:09 backup_nas kernel: [88569.969780]  ret_from_fork+0x35/0x40
Mar  7 19:07:47 backup_nas kernel: [90048.328442] sd 1:0:0:0: [sdb] tag#7 FAILED Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 19:07:47 backup_nas kernel: [90048.328445] sd 1:0:0:0: [sdb] tag#7 CDB: ATA command pass through(16) 85 06 2c 00 00 00 00 00 00 00 00 00 00 00 e5 00
Mar  7 19:07:47 backup_nas kernel: [90048.328549] sd 2:0:0:0: [sdc] tag#26 FAILED Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 19:07:47 backup_nas kernel: [90048.328554] sd 2:0:0:0: [sdc] tag#26 CDB: ATA command pass through(16) 85 06 2c 00 00 00 00 00 00 00 00 00 00 00 e5 00
Mar  7 19:37:47 backup_nas kernel: [91848.310572] sd 1:0:0:0: [sdb] tag#9 FAILED Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 19:37:47 backup_nas kernel: [91848.310576] sd 1:0:0:0: [sdb] tag#9 CDB: ATA command pass through(16) 85 06 2c 00 00 00 00 00 00 00 00 00 00 00 e5 00
Mar  7 19:37:47 backup_nas kernel: [91848.310638] sd 2:0:0:0: [sdc] tag#28 FAILED Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 19:37:47 backup_nas kernel: [91848.310640] sd 2:0:0:0: [sdc] tag#28 CDB: ATA command pass through(16) 85 06 2c 00 00 00 00 00 00 00 00 00 00 00 e5 00
Mar  7 20:07:47 backup_nas kernel: [93648.298104] sd 1:0:0:0: [sdb] tag#11 FAILED Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 20:07:47 backup_nas kernel: [93648.298107] sd 1:0:0:0: [sdb] tag#11 CDB: ATA command pass through(16) 85 06 2c 00 00 00 00 00 00 00 00 00 00 00 e5 00
Mar  7 20:07:47 backup_nas kernel: [93648.298137] sd 2:0:0:0: [sdc] tag#30 FAILED Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 20:07:47 backup_nas kernel: [93648.298138] sd 2:0:0:0: [sdc] tag#30 CDB: ATA command pass through(16) 85 06 2c 00 00 00 00 00 00 00 00 00 00 00 e5 00
Mar  7 20:37:47 backup_nas kernel: [95448.280900] sd 1:0:0:0: [sdb] tag#13 FAILED Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 20:37:47 backup_nas kernel: [95448.280903] sd 1:0:0:0: [sdb] tag#13 CDB: ATA command pass through(16) 85 06 2c 00 00 00 00 00 00 00 00 00 00 00 e5 00
Mar  7 20:37:47 backup_nas kernel: [95448.280934] sd 2:0:0:0: [sdc] tag#1 FAILED Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 20:37:47 backup_nas kernel: [95448.280935] sd 2:0:0:0: [sdc] tag#1 CDB: ATA command pass through(16) 85 06 2c 00 00 00 00 00 00 00 00 00 00 00 e5 00
Mar  7 21:07:47 backup_nas kernel: [97248.263197] sd 1:0:0:0: [sdb] tag#15 FAILED Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 21:07:47 backup_nas kernel: [97248.263201] sd 1:0:0:0: [sdb] tag#15 CDB: ATA command pass through(16) 85 06 2c 00 00 00 00 00 00 00 00 00 00 00 e5 00
Mar  7 21:07:47 backup_nas kernel: [97248.263230] sd 2:0:0:0: [sdc] tag#3 FAILED Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 21:07:47 backup_nas kernel: [97248.263232] sd 2:0:0:0: [sdc] tag#3 CDB: ATA command pass through(16) 85 06 2c 00 00 00 00 00 00 00 00 00 00 00 e5 00
Mar  7 21:37:47 backup_nas kernel: [99048.247913] sd 1:0:0:0: [sdb] tag#17 FAILED Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 21:37:47 backup_nas kernel: [99048.247916] sd 1:0:0:0: [sdb] tag#17 CDB: ATA command pass through(16) 85 06 2c 00 00 00 00 00 00 00 00 00 00 00 e5 00
Mar  7 21:37:47 backup_nas kernel: [99048.247945] sd 2:0:0:0: [sdc] tag#5 FAILED Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 21:37:47 backup_nas kernel: [99048.247947] sd 2:0:0:0: [sdc] tag#5 CDB: ATA command pass through(16) 85 06 2c 00 00 00 00 00 00 00 00 00 00 00 e5 00
Mar  7 22:07:47 backup_nas kernel: [100848.231763] sd 1:0:0:0: [sdb] tag#19 FAILED Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 22:07:47 backup_nas kernel: [100848.231767] sd 1:0:0:0: [sdb] tag#19 CDB: ATA command pass through(16) 85 06 2c 00 00 00 00 00 00 00 00 00 00 00 e5 00
Mar  7 22:07:47 backup_nas kernel: [100848.231797] sd 2:0:0:0: [sdc] tag#7 FAILED Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
Mar  7 22:07:47 backup_nas kernel: [100848.231798] sd 2:0:0:0: [sdc] tag#7 CDB: ATA command pass through(16) 85 06 2c 00 00 00 00 00 00 00 00 00 00 00 e5 00