March 30, 20179 yr A couple of weeks my on board SAS died on my motherboard. It seems to have done so whilst writing data from my cache drive. Finally got around to getting a PCi SAS card, and the drive it was writing data to at the time is now unmountable. I don't believe the HDD is dead. Anyway of fixing this without formatting the drive at all?
March 30, 20179 yr Do you know what file system it is? https://lime-technology.com/wiki/index.php/Check_Disk_Filesystems
March 30, 20179 yr Author Under main page all my HDDs show as XFS. I'm on my break at work right now. I'll see if I can do it in the 15 minutes I have.
March 30, 20179 yr Author Probably going to have to do this when I get home. That disk is now showing as missing.
March 31, 20179 yr Author Already rebooted unfortunately. Just a little bit of detail... When the server went down, for some reason I thought it'd be a good idea to try create a new config as I thought the drives on my what turned out to be broken SAS would magically reappear. I've installed the new SAS today, and finally completed the new config (in the exact same order as before) before I left for work and was under the impression it would rebuild parity. When I was on my break, which was maybe 4-5 hours later I noticed that this had already completed. I've just got back home, and my monthly parity check has started (last day of the month 3AM, it's now 3:40am). This is the message on my dashboard: Quote Parity is valid Activity started on Fri 31 Mar 2017 03:00:01 AM BST (today), finding 976754633 errors.Last result: 1 hour, 9 minutes, 33 seconds. Average speed: 958.7 MB/s Obviously it hasn't rebuilt the parity in 1 hour and 9 minutes. It's currently 8.4% the way through the monthly parity check... Obviously parity isn't correct, I'm not sure if my current parity check is fixing this or not, will it? Anyway, I've attached the current diagnostics. But I have already rebooted since my earlier message. tower-diagnostics-20170331-0342.zip Edited March 31, 20179 yr by Jawswing Adding diagnostics.
March 31, 20179 yr Author Oh, and it is disk 7 that is missing/not installed. Serial number - ST3000DM001-1CH166_Z1F1JVMB When my server went down a couple of weeks ago. I noticed one missed disk, it was definitely one of the last disks. (Maybe disk 5-8). I have my cache to write to the pool at midnight. I normally get home from work anywhere between 2-4am. And I pretty much noticed straight away that a drive had gone 'missing'. Doing what I imagine a lot of people do, first thing I did was restart my server (bad move). Then that's when I realised a whole bunch of drives had gone missing, and later found that the SAS had died. I can't say 100% that Disk 7 is the one that had originally dropped, but I'm fairly sure it is.
March 31, 20179 yr Author I'm thinking I possibly have a bad SAS cable or something here... When I made this post ALL drives were visible in Unraid. Only when creating the new config Disk 7 had disappeared. Opened the case up, had a look around, booted up and my server was stuck on system initalizing (it's done this before whilst installing the PCi card, I was guessing poorly seated PCI or I've knocked a cable). Finally got it back on, Disk 7 is now showing... Disk 2 and Disk 3 are missing though.
March 31, 20179 yr Author Or even a bad power cable/PSU? Few more issues with posting, got it back up, and disk 8 has dropped... I have a Lian Li Q26 case, I bought backplanes for each one, five in total (two per plane). And either one molex or one sata cable powers two HDDs. The recently dropped disk 8 is the one HDD I have connected to an onboard SATA port.
March 31, 20179 yr Author I've literally no idea what the problem is. But I've managed to fix it. For now... When my server went down, I hadn't touched it. I do live with my parents, they may have, I see no reason that they did, but it is downstairs in the living area. The case I use is a Lian Li Q26, nice little case, holds plenty of HDDs, being small though, it's awful on space. I had the side panel pushed in against all the Sata cables and power cables. I've took the side panel off and I can now see all the HDDs. I'm guessing the side panel was pushing up that close to the cables it was obscuring them/causing issues. Anyway, I have all disks back, I now have disk 7 back. Back to the issue, now I've added that drive back to the array, it is now doing a parity sync/data rebuild. This should fix the problem, right?
March 31, 20179 yr Author Despite Disk 7 currently being emulated, and the fact that I'm currently doing an Array Started•Parity-Sync / Data-Rebuild, some of my data seems to have gone. For example I have The Simpsons on my server and I can clearly see that some episodes are missing. Are these likely to reappear after the data rebuild. Little confused if the drive is being emulated...
March 31, 20179 yr First let me say I'm not quite sure of all the steps you did, some look suspicious, so I can't be sure if your current parity is valid or not. You may cancel the parity (read) check. Disk7 is not being detect, so check cables, if all are OK possibly a dead disk. You need to check filesystem on the emulated disk7:https://lime-technology.com/wiki/index.php/Check_Disk_Filesystems#Drives_formatted_with_XFS If repair is successful your missing data should come online (as long as parity really is valid) and you'll need to rebuild it using a new spare disk, if old disk7 still works keep it intact in case it's needed. Edited March 31, 20179 yr by johnnie.black
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