Qiou

I think I've found the culprit here: root@Kirito:~# dd if=/dev/sdc of=/dev/null bs=4k status=progress 3133599744 bytes (3.1 GB, 2.9 GiB) copied, 16 s, 196 MB/s^C 802639+0 records in 802638+0 records out 3287605248 bytes (3.3 GB, 3.1 GiB) copied, 16.7633 s, 196 MB/s root@Kirito:~# dd if=/dev/sdb of=/dev/null bs=4k status=progress 275914752 bytes (276 MB, 263 MiB) copied, 15 s, 18.8 MB/s^C 67394+0 records in 67393+0 records out 276041728 bytes (276 MB, 263 MiB) copied, 15.1245 s, 18.3 MB/s root@Kirito:~# dd if=/dev/sdd of=/dev/null bs=4k status=progress 4916891648 bytes (4.9 GB, 4.6 GiB) copied, 16 s, 307 MB/s^C 1204285+0 records in 1204284+0 records out 4932747264 bytes (4.9 GB, 4.6 GiB) copied, 16.0833 s, 307 MB/s sdb is my 3TB drive, maybe it's becoming to fail, unsure why now though new diagnotics attached kirito-diagnostics-20211212-0315.zip

@trurl It's been now 24h and my array only managed to rebuild 1.59TB of Parity, despite numerous run at 110/120MB/s the days before I don't see any errors on disk Smart results, cables are the same as before, the parity checks on 12/09 and 12/10 were both on the 12TB drive Only change I had to do was cutting the 3.3V rail to power the 12TB drives, because they refused to boot otherwise

Other models are Western Digital White Label 12TB, freshed shucked from 3 My Book units (identical)

Another useful info: One of the three 12TB drives is performing way faster than the 2 others. I may have it a limitation of my motherboard ? I'll let the parity rebuild on this drive first and get back on why the 2 others are performing way slower

@trurl I've attached diagnostics here kirito-diagnostics-20211210-2120.zip So I can rebuild the drives onto larger ones ? That could work for me, I'll move files back, rebuild the parity and find out how to rebuild on a new drive

Hey fellow Unraiders I've bough 3*12TB in order to replace my 1*4TB and 1*3TB drives Now the setup is 1*12TB as parity (already in place and set up) 2*12TB cleared and added to the array 1*3TB and 1*4TB which are already in place Now it's time to move files between disks in order to be able to remove the previous disks I know the question may have been asked abnout how to transfer files between disk (and not Shares). I've found multiple answer but not a clear one of a recent one I found Unbalance quite reliable in the past, I'm planning to use it, but today transfer speed are really slow, like 9-12MB/s I've disabled parity to help with preventing writing to it, I'll redo the parity once done Any suggestions ? Thanks in advance