Cache Pool - Remove a disk

Go to solution Solved by JorgeB,

Recommended Posts

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.  

2023-01-10 11.25.42 db8f58f9b507.png

2023-01-10 11.26.08 0eaf702c28f8.png

2023-01-10 11.26.43 d69ba2438eed.png

Link to comment
12 hours ago, johntdyer said:

I'm having the same issue

Not really the same, your cache was xfs:



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.

Link to comment

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.