Cache Pool - Remove a disk

[jbrukardt]

Good morning all,   

 

I accidentally mis-allocated a new NVME drive I put in the system.   I meant to make it a new cache pool that I was going to use for VMs only, but accidentally added it to the existing cache pool which houses mover/appdata/etc.   

 

I would like to remove it.... but it seems that breaks the entire cache pool if i do that.   What is the procedure for removing a disk from the cache pool.   

 

Screenshots attached of the cache details.  

[JorgeB]

Unassign the device you want to remove (leave it unassigned for now) and start the array, once the removal is complete you can assign to a new pool.

[jbrukardt]

36 minutes ago, JorgeB said:

Unassign the device you want to remove (leave it unassigned for now) and start the array, once the removal is complete you can assign to a new pool.

ill try again, but that resulted in the cache pool not mounting due to a missing device.  

[trurl]

attach diagnostics to your NEXT post in this thread

[johntdyer]

I'm having the same issue, here are my diagnostic 

vault-diagnostics-20230113-1516.zip

[JorgeB]

12 hours ago, johntdyer said:

I'm having the same issue

Not really the same, your cache was xfs:

 

J

an 13 11:50:17 vault  emhttpd: shcmd (71): mkdir -p /mnt/cache
Jan 13 11:50:17 vault  emhttpd: shcmd (72): mount -t xfs -o noatime,nouuid /dev/sdc1 /mnt/cache
Jan 13 11:50:17 vault kernel: XFS (sdc1): Mounting V5 Filesystem
Jan 13 11:50:17 vault kernel: XFS (sdc1): Starting recovery (logdev: internal)
Jan 13 11:50:17 vault kernel: XFS (sdc1): Ending recovery (logdev: internal)
Jan 13 11:50:17 vault kernel: xfs filesystem being mounted at /mnt/cache supports timestamps until 2038 (0x7fffffff)

 

You cannot add a device to a xfs pool, they support single devices only, you can go back to the single xfs cache pool, backup then reformat btrfs.