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zfs: devices have different sector alignment

V

Vask

n00b
Joined
Jun 6, 2011
Messages
11
3 weeks ago i bought 6 Seagate Barracuda 7200.14 ST3000DM001 3TB drives. I used 5 of them for a raidz1 and the other I had formatted in an NTFS machine for a few days. I then decided to make 2 mirrored vdevs for a pool with 2 1TB Samsung HD103UJ's and 2 Seagate 2TB drives.

3 weeks later I wanted to change the 1TB drives to 3TB drives so I purchased another ST3000DM001. I replaced the first 1TB drive no problem but when I went to replace the second with the new drive I get the error:

Code: 
cannot replace c7t9d1 with c7t9d1: devices have different sector alignment

The smartinfo for both drives is:

This is the drive that came with my original 6.

Code: 
=== START OF INFORMATION SECTION ===
Device Model:     ST3000DM001-1CH166
Serial Number:    Z1FXXXXX
LU WWN Device Id: 5 000c50 04e1ce014
Firmware Version: CC43
User Capacity:    3,000,592,982,016 bytes [3.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   8
ATA Standard is:  ATA-8-ACS revision 4
Local Time is:    Mon Nov 26 11:03:35 2012 MST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

This is the drive I got 3 weeks later:

Code: 
=== START OF INFORMATION SECTION ===
Device Model:     ST3000DM001-1CH166
Serial Number:    W1FXXXXX
LU WWN Device Id: 5 000c50 05ce689f7
Firmware Version: CC24
User Capacity:    3,000,592,982,016 bytes [3.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   8
ATA Standard is:  ATA-8-ACS revision 4
Local Time is:    Tue Nov 27 11:28:25 2012 MST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

I thought maybe one drive was 512 and the other 4096 but they both show the same so im not sure whats wrong. Any suggestions would be greatly appreciated on how to mirror the 2 drives or do I need to contact Seagate or something?
 
Last edited:
bumping hoping someone might have insight into why I am getting this error trying to mirror these 2 drives.
 
Your problem may happen with 4k disks on vdevs with ashift=9.
enter the following command: zdb -C 'poolname' and check if your vdev has a ashift value of 9 (512B sector) or ashift=12 (4k sector).

If you have a newer OI, your vdev should be ashift=12 automatically when disks are reporting 4k physical sector size, otherwise you can override settings in sd.conf.
On FreeBSD you have also the option to force ashift=12
 
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