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Recent content by eess

  1. E

    HDD shipping during cold winter days, would that be bad for the HDD ?

    New drives are sealed and have (or at least had) a moisture absorbing packet inside the sealed bag. HGST, for example, specifies -40C-70C range for non-operating ambient temperature. (Fun fact: -40C = -40F.)
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    Western Digital Red 8TB Video Review

    Those are logical heads and cylinders and sectors/track. The numbers have been bogus for backwards compatibility for decades.
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    Western Digital Red 8TB Video Review

    WD RED 8TB WD80EFZX hdparm and smartctl hdparm -I output ATA device, with non-removable media Model Number: WDC WD80EFZX-68UW8N0 Serial Number: xxxxxxxx Firmware Revision: 83.H0A83 Transport: Serial, ATA8-AST...
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    Backblaze HD Reliability Stats Q3 2015

    https://www.backblaze.com/blog/hard-drive-reliability-q3-2015/
  5. E

    Seagate 8TB PMR

    9/1/2015 http://www.anandtech.com/show/9577/seagate-announces-a-trio-of-8tb-drives-for-enterprise-applications 6x1.3 TB PMR platters 10/7/2014 http://www.kitguru.net/components/hard-drives/anton-shilov/showa-denko-begins-to-produce-1-3tb-platters-for-high-capacity-hdds/ 11 months from...
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    High Capacity Drives for 4 Bay Setup

    Mostly not disagreeing with you, but it really depends upon the size of the array you want to make and the price per drive. I made a spreadsheet the other day to graph the dollar cost of a RAID6 array vs. total array size using 3/4/5/6 TB drives. For any given capacity, it cost the most to...
  7. E

    Please Help me to choose Right CPU /M.board

    Hi, sorry for the necrobump, but I think I have useful information. I did a search and didn't find any other mention of Gigabyte HPA on the site so I am replying here. I have a GA-M59SLI-S5. It has 2 flash chips for Dual BIOS. However, it will also do HPA on the first disk it finds. The...
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    HGST's 10TB drive uses custom software to access shingled platters

    I wonder if an actual market for commercial disk defrag software will come back into existence. It seems like they'd need to play Towers of Hanoi with the bands. Maybe the OS can do filesystem profiling to put frequently changed data into different bands to minimize band rewrites. But do any...
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    AMD HBM High Bandwidth Memory Technology Unveiled @ [H]

    HBM is just DRAM with a wide interface. The latency is about the same as main memory, but depends on your access pattern. The organization (banks, rows, etc.) is about the same as SDRAM. So you get a lot of bandwidth if your access pattern works with that memory organization, but not the...
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    Seagate 8TB Internal HDD

    I was thinking whether these SMR drives would be better in RAID4 where the parity stripe is stored on a non-SMR drive (or stored on multiple drives in RAID0 because you can't yet get a single 8TB non-SMR drive). With RAID5 the parity writes are distributed so all of the drives are going to...
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    4x 6 TB WD Red - RAID 5 or 6? And which controller?

    RAID 10 with 4 drives is always more risky since you will lose the volume if the wrong two drives are lost. Since OP mentions only a data resilience requirement, RAID 6 is safest since any two drives can be lost without losing any data.
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    Supermicro X10SAE - Xeon Haswell, C226, ATX manual:

    Couple of things I have found with my apparently late-build X10SAE (it came with BIOS 2.00 04/21/2014). PS/2 combo port -- I traced the pins to the NCT6776D Super I/O chip and found that it does hook up pins 2/6 for the mouse data/clk. The splitter cables for sale all look the same but some...
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    Supermicro X10SAE - Xeon Haswell, C226, ATX manual:

    Just got one. It has C2 (S-SPEC SR179) and came with BIOS version 2.00.
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