May 22May 22 It keeps giving me errors when i remove one and try to start up.If i put the samsung to place 1 it also gives me the error and i coudnt just put in the new drive and boot to force it to rebuild on the new drive.What is the best way to replace the dying drive?
May 22May 22 Community Expert https://docs.unraid.net/unraid-os/using-unraid-to/manage-storage/cache-pools/#replace-a-disk-in-a-pool
May 22May 22 Author 27 minutes ago, JorgeB said:Cache cfg is in single mode, post the output from btrfs fi showunraid:~# btrfs fi showLabel: none uuid: 5e5ff1b9-820c-4d95-877f-60b4fafb86de Total devices 2 FS bytes used 209.35GiB devid 1 size 476.94GiB used 234.05GiB path /dev/sdc1 devid 2 size 465.76GiB used 228.03GiB path /dev/sdb1Label: none uuid: b46efa3b-1e2e-4d53-a083-5161627f1866 Total devices 1 FS bytes used 54.98GiB devid 1 size 150.00GiB used 76.02GiB path /dev/loop2Label: none uuid: 35470472-fff9-46fd-b563-4b0558caae6b Total devices 1 FS bytes used 1.14MiB devid 1 size 1.00GiB used 126.38MiB path /dev/loop3
May 22May 22 Community Expert Solution The pool has some single profile chunks, see if you can convert all to raid1:If you can still start the array with the old device, assign it back; if not, reimport the pool with sdc and sdbon main click on the first device for that pool and then "remove pool"back on main, create a new pool with the same name and 2 slotsassign the two existing pool devices; leave the filesystem set to autostart the array to import the poolThen click the first pool device and balance the pool to RAID1. Post new diags when done or if there are errors during the balance.
May 23May 23 Author Ok thank you! Will try this out.Tuesday im near the machine again and then im gonna do that.Making full backup of cache now to array.
May 23May 23 Community Expert You should disable Docker and VM Manager until you get cache working again.
May 27May 27 Author On 5/22/2026 at 5:42 PM, JorgeB said:The pool has some single profile chunks, see if you can convert all to raid1:If you can still start the array with the old device, assign it back; if not, reimport the pool with sdc and sdbon main click on the first device for that pool and then "remove pool"back on main, create a new pool with the same name and 2 slotsassign the two existing pool devices; leave the filesystem set to autostart the array to import the poolThen click the first pool device and balance the pool to RAID1. Post new diags when done or if there are errors during the balance.Just did this. Here are my diagnostics.myunraid-diagnostics-20260527-1620.zip
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