March 31, 20188 yr HI all, Need some help I am a newbie to Unraid, although it has been running flawlessly for 3 months. I had a drive fail, showing as unmountable. So got a replacement drive added it and unplugged the parity drive instead of the failed drive. I booted and noticed parity was gone powered down and reconnected the parity and removed the failed drive. When I booted back up it is showing no drive assigned for parity and I can select from 2 drives. Both of these show up as new devices. Did I just kill all the data? If not how can I resolve this mess. Sorry for being a newbie dumbass. Thanks for your help. Steve
March 31, 20188 yr As long as don't start the array with the wrong disk assigned to parity your data should be fine. Do you know which one is parity? Go to Tools - Diagnostics and post complete zip.
March 31, 20188 yr Author Okay fortunately have not started the array yet! See diagnostics attached. tower-diagnostics-20180331-1155.zip
March 31, 20188 yr So, do you know which disk WAS parity? Do you have any screenshots or previous diagnostic or just a syslog we can go on to try to determine which is parity? Your diagnostics seems to think that X9SZ (last 4 characters of serial) is newly assigned to parity, but that H98S is wrongly assigned as disk1. Do you know which disk is the new disk? Usually we would assign NO disks to parity and assign ALL disks as data disks, then try to start the array, and if only one disk is unmountable then that is the parity disk. But you said you had intended to replace a disk that was already unmountable (which wasn't the correct way to proceed in that case) so you will probably have 2 unmountable disks. We really need some way to know which disk is which.
March 31, 20188 yr Author I did not take a screenshot....Newbie dumbness. Is there any other way to tell?
March 31, 20188 yr Author I just remembered this was the disk that failed ST31000520AS_9VX0VBZA does that help?
March 31, 20188 yr Author Sorry I think I just figured this out. ST31000520AS_9VX0X6EF is an external drive. WDC WD10EZEX-08WN4A0 is the new replacement drive. So original Parity should be ST31000520AS_9VX0X9SZ.
March 31, 20188 yr Please reconnect old disk1, disconnect the replacement disk if needed, and post new diags, or just its SMART report.
March 31, 20188 yr Author Connected disk 1 and disconnected replacement. See diagnostics attached. tower-diagnostics-20180331-1352.zip
March 31, 20188 yr Disk1 has some pending sectors and does need to be replaced, but since it's connected you can use it for doing a new config, so if you are sure 9SZ is the original parity do the following: -Tools -> New Config -> Retain current configuration: All -> Apply -assign any missing disk(s) to restore the array to the original config (with old disk1), double check assignments are correct-check "parity is already valid" before starting the array -start the array (disk1 will likely be unmountable, ignore for now) -stop array and power down the server -remove disk1 and connect the replacement -power back up, assign new disk1 and start array to begin rebuild, if disk1 is still unmountable ignore for now, don't format, check filesystem when the rebuild finishes. Keep old disk1 intact for now in case it's needed.
March 31, 20188 yr Author Parity drive has a warning - All existing data on this device will be OVERWRITTEN. So I guess Parity is not valid. Is there another route?
March 31, 20188 yr That is just a warning, as long as "parity is already valid" is checked it won't be overwritten.
March 31, 20188 yr Author Just making sure this is what you are talking about (see screen shot attached)Screen Shot 2018-03-31 at 2.24.15 PM
March 31, 20188 yr Author Awesome all is as it was. Thank you! It even mounted Disk1. Do I still need to replace it or is there a repair I can do on the disk? Thanks again!
March 31, 20188 yr 4 minutes ago, SteveC said: Do I still need to replace it Yes, the disk is failing, it's possible the emulated disk will appear unmountable, if it does follow the instructions above.
March 31, 20188 yr Author Switched to the replacement drive. Get this error. Too many wrong and/or missing disks! http://tower.local/webGui/images/yellow-blink.pngStopped. Invalid configuration. Screen Shot 2018-03-31 at 2.52.53 PM
March 31, 20188 yr Why is parity red again? Post current diags but I'll be leaving soon, you'll probably need for someone else to jump in, or I'll check back tomorrow.
March 31, 20188 yr 1 minute ago, johnnie.black said: Why is parity red again? I see why, you're parity disk is also failing: 197 Current_Pending_Sector -O--C- 089 089 000 - 485 198 Offline_Uncorrectable ----C- 089 089 000 - 485
March 31, 20188 yr Before I leave, this is what I would do: -Do another new config with a new parity disk and a new disk1, don't check parity is already valid and let parity sync. -When done and if not done yet format disk1, mount old disk1 with UD plugin and copy everything you can from it, it's only showing a couple of pending sectors so it should be mostly OK. Make sure notifications are enable so you are warned of these issues in the future.
March 31, 20188 yr Author Also leaving now will do later and post results later. Thanks for the help!!
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