craigr

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About craigr

  • Rank
    Advanced Member

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    Male
  • URL
    http://www.cir-engineering.com
  • Location
    Chicago USA
  • Personal Text
    Video Calibration Engineer

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  1. craigr

    Preclear plugin

    It seems that the script is more aggressive on testing the drive and takes a lot longer. Is that my imagination? craigr
  2. craigr

    Preclear plugin

    Are others having this issue? I just picked up 5x 8TB drives and want to preclear. I’ll avoid updating unRAID until this is resolved. craigr
  3. Fix common problems checking your drives. You can set FCP so that it only does that to drives that are spun up Ah, THANK YOU! Though I thought I had already set FCP to only check drives that are spun up... but I hadn't. craigr
  4. I have this activity on all of my discs at the exact same time (15 discs and cache as well). What is causing these temp files to be created, opened, then deleted, any ideas? I have had issues with discs spinning up randomly as well. The only users that have write privileges are my login and root. ** Disk 13 Apr 29 00:12:33 CREATE => /mnt/disk13/1628246992.tmp Apr 29 00:12:33 OPEN => /mnt/disk13/1628246992.tmp Apr 29 00:12:33 OPEN => /mnt/disk13/1628246992.tmp Apr 29 00:12:33 DELETE => /mnt/disk13/1628246992.tmp Apr 29 00:19:18 CREATE => /mnt/disk13/651708839.tmp Apr 29 00:19:18 OPEN => /mnt/disk13/651708839.tmp Apr 29 00:19:18 DELETE => /mnt/disk13/651708839.tmp Apr 29 04:30:47 CREATE => /mnt/disk13/701376598.tmp Apr 29 04:30:47 OPEN => /mnt/disk13/701376598.tmp Apr 29 04:30:47 OPEN => /mnt/disk13/701376598.tmp Apr 29 04:30:47 DELETE => /mnt/disk13/701376598.tmp May 06 04:31:22 CREATE => /mnt/disk13/1207819530.tmp May 06 04:31:22 OPEN => /mnt/disk13/1207819530.tmp May 06 04:31:22 OPEN => /mnt/disk13/1207819530.tmp May 06 04:31:22 DELETE => /mnt/disk13/1207819530.tmp May 13 04:30:57 CREATE => /mnt/disk13/2135694730.tmp May 13 04:30:57 OPEN => /mnt/disk13/2135694730.tmp May 13 04:30:57 OPEN => /mnt/disk13/2135694730.tmp May 13 04:30:57 DELETE => /mnt/disk13/2135694730.tmp I'm concerned. Thanks, craigr
  5. craigr

    Preclear plugin

    Avoid running cables parallel to each other. Having them cross over each other isn’t usually an issue, but if run side by side the EM fields can cause errors. craigr
  6. craigr

    Preclear plugin

    This is what I was just thinking; maybe all cables are tied together or are running too closely to other components or power wires. I miss read the original post and thought it was one CRC on one drive, not one on all four. You could have not so great SATA cables or a marginal controller on the motherboard. Once you you get the array built I would run two or three parity checks to make sure the numbers don’t rise. Also, if the SATA power cable terminator is not so great or poorly connected, or if you don’t have a large enough power supply you can sometimes get these error. I once racked up thousands of CRC’s on four drives connected to the same 4-way power splitter... and discovered my SATA powered splitter was not plugged in all the was to the power supply SATA power connector. Unplug and replug and problem was gone. Many years later no CRC has never increased. craigr
  7. craigr

    Preclear plugin

    Probably a SATA cable issue, or even low on power. craigr
  8. craigr

    Preclear plugin

    It ran fine on a known bad 2TB drive and failed when it hit errors. It seems to be working correctly. I’m running it again on same drive, but can slap in a good 100GB drive once it’s finished. craigr
  9. craigr

    Errors reported on parity drive. What do they mean?

    The seek error rate does not look good either, but that can be deceptive. If it passes a SMART test I would also run a preclear on it. There are a lot of power on cycles. I assume this disc was re-purposed from another computer? craigr
  10. craigr

    Preclear plugin

    AwesomeTHANK YOU @gfjardim so much! Very kind regards, craigr
  11. craigr

    SSD overprovisioning on Array drive?

    This seems correct, but you must perform a secure erase or blkdiscard first. I'm only posting this so others in the future will not be confused. Link to secure erase procedure: https://www.thomas-krenn.com/en/wiki/SSD_Secure_Erase Thanks again, craigr
  12. craigr

    SSD overprovisioning on Array drive?

    OK, you guys were totally correct. I messaged Limetech directly about this and he sent me links with detailed instructions on how to get overprovisioning to work based on these methods. It looks like he posted the details to this thread already Here are the two paramount links: You must first perform a secure erase: https://www.thomas-krenn.com/en/wiki/SSD_Secure_Erase Then use hdparm: https://www.thomas-krenn.com/en/wiki/SSD_Over-provisioning_using_hdparm I now have a 256GB 840PRO that shows 230GB in Unassigned Devices Very kind regards, craigr
  13. craigr

    SSD overprovisioning on Array drive?

    Thank you so much. That was very easy and it worked perfectly. I now have a Samsung 840 PRO 256GB that shows 230GB in Unassigned Devices. Now all I have to do is swap out the old SSD and rebuild. Awesome! Do you mind if I share your instructional post on the public forum? I certainly do not know. I found it impossible to even discover what drives support DZAT. I did a lot of googling and the only reference I found was a guy on a random forum stating that his 840 PRO supports DZAT and that his 850 PRO does not. He wanted to know if Samsung had any plans to support DZAT on the 850 PRO in the future. I would like to know if Samsung supports DZAT on the 860 or 960 as well. Based on that one piece of information I rolled the dice and bought the 840 PRO on eBay for $65 with only 31 days of use and about 1TB written. I probably saved myself some money anyway versus buying a newer drive I really expected to find a compiled list of know drives that support DZAT someplace, but I uncovered nothing of the sort. I would have liked to have bought a more modern drive, but I didn't want to get stuck with a drive that did not support DZAT. I did buy an "Inland Professional 240 GB" budget drive at Microcenter for $50 and checked it. The drive did not sport "DZ_TRIM" or "DX_TRIM" so I returned it. However, One of the difficulties in searching is what to search for; DZAT, DZ_TRIM, Deterministic read zeros after TRIM... I suspect if you build unRAID to support DZAT the community will quickly compile a list. That said, surely there are other situations other than unRAID where this information must be required? Thanks again, Craig Rounds
  14. craigr

    SSD overprovisioning on Array drive?

    Yeah, I follow what you are saying. Kind regards, craigr
  15. craigr

    SSD overprovisioning on Array drive?

    ...but that defeats the purpose than doesn't it Thanks again, craigr

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