July 27, 20241 yr I've got a pool with just one drive in it for our cctv its a 3tb drive that's been on for nearly 9 years and thought it was time to upgrade it. I added in a 16tb to the pool and it made both unmountable when spun up. The original drive was in xfs file format. I thought no problem remove the second and it will get up and running like it was before the second drive was added, however it hasn't and now the original drive is unmountable. There's nothing on this drive particularly worth keeping however I was going to transfer things over recreate the shares then remove it. I know I could create a new pool add the new drive and go from there but I'm trying learn and understand why this happened and also how to fix. Can any one point me in the right direction?
July 27, 20241 yr Community Expert You cannot create a multi device xfs pool, post the current diagnostics and the output of blkid /dev/sdX Replace X with the correct pool device letter
July 27, 20241 yr Author Solution figured it out. Steps I took; 1. Stop array 2. Removed disk from cachepool 3. Configured the cachepool for XFS. 4. Placed the disk back in the cachepool.
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