January 19, 20233 yr Installed a second parity disk yesterday and the parity sync is currently at 46%. Just got home to see disk 14 has had 327,424 read errors. Doesn't look to be any serious SMART errors. It's connected to a Broadcom 8 Port 6Gbps SAS 9207-8i SGL PCI-E Host Bus Adaptor. Doesn't seem to be any issues with the others disks connected to the controller. Bit worried if it fails as I have no parity at the moment and have had a few disks fail recently. Attached diagnostics. Please advise. tower-diagnostics-20230119-2218.zip Edited January 19, 20233 yr by mrbens
January 19, 20233 yr Community Expert 55 minutes ago, mrbens said: Installed a second parity disk yesterday and the parity sync is currently at 46% Why did you New Config? Installing parity2 (Q) will not invalidate parity (P) and only parity2 is built, but New Config makes it rebuild both. Looks like connection problem with disk14
January 20, 20233 yr Author Hi trurl, thanks for the reply. I did New Config since I was removing a disk to move to another server and also removing 3 disks that had either died or SMART errors were incrementing that I'd copied the data off (https://forums.unraid.net/topic/133224-6115-disk-9-disabled-after-1175-errors/). Is that the correct way to remove disks from the array? Had a few other changes to make at the same time as removing the disks, so since I needed to do New Config sorted it all at once to let parity rebuild: Added second parity. Added a new data disk. Moved a disk physically in the server and on the GUI to another slot. Cables for disk 14 seem securely in. Is there anything you recommend I do with disk 14 such as extended SMART test or check filesystem? When the parity sync finishes, should I do another parity check to see if it completes without errors? Edited January 20, 20233 yr by mrbens
January 20, 20233 yr Community Expert 10 hours ago, mrbens said: Is that the correct way to remove disks from the array? You do need new config to remove disks yes. It can be done without invalidating parity if they can still be written to and you have time.
January 20, 20233 yr Community Expert 12 hours ago, mrbens said: Is that the correct way to remove disks from the array? yes 12 hours ago, mrbens said: disk 14 such as extended SMART test yes 12 hours ago, mrbens said: or check filesystem no
January 20, 20233 yr Author 8 hours ago, Kilrah said: You do need new config to remove disks yes. It can be done without invalidating parity if they can still be written to and you have time. Thanks. How do you remove disks without invalidating parity please?
January 20, 20233 yr Author 5 hours ago, trurl said: yes yes no Thanks trurl. Parity has about an hour left to finish syncing, then I'll start the extended SMART test. No further errors luckily. Is it worth doing another parity check after the SMART test?
January 20, 20233 yr Community Expert 25 minutes ago, mrbens said: Thanks. How do you remove disks without invalidating parity please? It's in the manual: https://wiki.unraid.net/Manual/Storage_Management#Removing_data_disk.28s.29 Unmount the disk, then write all zeroes to it.
January 20, 20233 yr Author 6 minutes ago, Kilrah said: It's in the manual: https://wiki.unraid.net/Manual/Storage_Management#Removing_data_disk.28s.29 Unmount the disk, then write all zeroes to it. Thank you.
January 20, 20233 yr Community Expert 2 hours ago, mrbens said: How do you remove disks without invalidating parity please? Mixed results with that, and doesn't save any time. Simpler to just rebuild parity.
January 21, 20233 yr Author On 1/20/2023 at 1:04 PM, trurl said: yes yes no Extended SMART test didn't go too well. Got to around 70% and now the disk has been error disabled after a further 1024 errors. This is about the 8th disk recently to fail. Really don't know what's going on. Attached diagnostics. Please advise if there's anything else to do, but guess it'll need replacing. Thank you. tower-diagnostics-20230121-1623.zip
January 21, 20233 yr Community Expert I would replace then you can work with the disk outside the array to see if it's worth reusing for something. Preclear might get those pending sectors reallocated.
January 21, 20233 yr Author 36 minutes ago, trurl said: I would replace then you can work with the disk outside the array to see if it's worth reusing for someting. Preclear might get those pending sectors reallocated. Thank you. Swapped out disk 14 for a spare disk I was going to use for backups and moved it to another server to try a Preclear. With all the read errors during the parity-sync, does that mean there's likely to be corrupt files when disk 14 gets rebuilt from parity? Edited January 21, 20233 yr by mrbens
January 22, 20233 yr Community Expert Keep original disk intact with its contents until you are satisfied with the rebuild.
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