neuk34 Posted August 28, 2020 Share Posted August 28, 2020 Hello, I went back from vacation, I switch my server on and disk 4 went off. A parity check has been automatically launched and discover 256 errors on disk 8 (xfs). I've ordered a new drive but I want to be sure that nothing will go wrong. Could you please help me to avoid any data lost? Thanks nas-diagnostics-20200828-0950.zip Quote Link to comment
JorgeB Posted August 28, 2020 Share Posted August 28, 2020 Disk8 appears to be failing, and since there's already a disabled disk and you only have single parity you can't rebuilt it, you can try copying everything you can from that disk to others or using ddrescue. Disk4 is not showing SMART, you'll need to check connections. Quote Link to comment
JorgeB Posted August 28, 2020 Share Posted August 28, 2020 Forgot to mention, CPU is overheating, check/clean cooler. Quote Link to comment
neuk34 Posted August 28, 2020 Author Share Posted August 28, 2020 1 hour ago, johnnie.black said: Disk8 appears to be failing, and since there's already a disabled disk and you only have single parity you can't rebuilt it, you can try copying everything you can from that disk to others or using ddrescue. Disk4 is not showing SMART, you'll need to check connections. you'll find smart report here. thank you nas-smart-20200828-1306.zip Quote Link to comment
JorgeB Posted August 28, 2020 Share Posted August 28, 2020 SMART isn't working. Quote Link to comment
neuk34 Posted August 29, 2020 Author Share Posted August 29, 2020 In this situation, does it mean that I won't be able to recover disk 4 datas ? Quote Link to comment
JorgeB Posted August 30, 2020 Share Posted August 30, 2020 Possibly if disk4 is really failing, try power cycling the server and then manually get a SMART report, post the output of: smartctl -x /dev/sdX Replace X with correct letter, it might change after rebooting. Quote Link to comment
neuk34 Posted September 1, 2020 Author Share Posted September 1, 2020 (edited) @johnnie.black, I decided to clean my server when you mentionned that CPU was overheating. A lot of dust has been removed. Disk4 is clearly dead, but content is still emulated thanks to parity drive. I've plugged a fresh new 4 To drive that I added to the array. This new drive (disk12) has been automatically cleaned up and formatted into Reiserfs. Parity check has not detected any error, even on disk8 (that previously shown 256 errors - maybe overheating with dust?) Then, I started to copy the emulated content of the failed disk4 directly into this new disk via terminal (mc with RenMov). After 180 Go transferred, something went wrong and array freezed. I had to make an uncleaned shutdown to restart server. Now, my new drive is stuck at "mounting". New uncleaned shutdown to restart. I started array into safe mode, but it still stuck at mounting status. I also tried to reiserfsck disk12 without success. What should I do ? thanks nas-diagnostics-20200901-1523.zip Edited September 1, 2020 by neuk34 Quote Link to comment
JorgeB Posted September 1, 2020 Share Posted September 1, 2020 Reiserfs can take a long time (hours) to mount large disks after an unclean shutdown, just wait, if there's a HDD led activity it should be on. Quote Link to comment
neuk34 Posted September 2, 2020 Author Share Posted September 2, 2020 Thanks @johnnie.black After few hours, my array is now alive as you predicted. I launched a new parity check, and my disk 8 is unfortunately still showing 128 errors, with disk4 disabled. Do you think that I should be able to rebuild disk4 if I plug a new fresh disk replacement, or it won't work? Should I : - transfer emulated content through terminal from parity -disk4 to disk12 - buy a new fresh disk to recover disk8 datas thanks to ddrescue what do you recommend? Quote Link to comment
JorgeB Posted September 2, 2020 Share Posted September 2, 2020 You have two failing disks with single parity, copy everything you can from emulated disk4 and disk8 to other disks in the array, then do a new config with the remaining good disk and re-sync parity, alternatively you can use ddrescue on disk8 and actual disk4 then do a new config with the clones. Quote Link to comment
neuk34 Posted September 17, 2020 Author Share Posted September 17, 2020 Everything went fine ! I recovered all my datas so thank you. Last point : do you know how to format an unassigned device ? I follow Settings > Unassigned Devices > Destructive Mode and set it to Enabled but it doesn't work. Thanks Quote Link to comment
JorgeB Posted September 17, 2020 Share Posted September 17, 2020 See the first couple of posts in the UD plugin support thread: Quote Link to comment
neuk34 Posted September 17, 2020 Author Share Posted September 17, 2020 Works great ! thanks Quote Link to comment
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