drewd

Thanks so much for all the help with this. I was able to mount the cache pool into a created /temp folder with mount rescue command. After a couple of failed attempts - it finally mounted into my temp dir. I am copying the data into the array as i type this. Making some assumptions here on process forward. 1) After copy off old cache into array, I can remove pool in the system 2) then stop array, remove drives 3) replace drives 4) Start array, create new pool and add drives then 5) copy data back from array to new cache pool That sound about right?

Array started - fresh diagnostics below tower-diagnostics-20250728-1433.zip

may be a silly question - do i remove the drives from the pool first before removal - of that doesnt matter. thanks again!!

Label: none uuid: a16da88c-8713-48b8-bdee-62a4c9889dde Total devices 2 FS bytes used 226.82GiB devid 1 size 465.76GiB used 464.74GiB path /dev/sdac1 devid 2 size 465.76GiB used 464.74GiB path /dev/sdab1 Label: none uuid: 0c1f9f61-8156-42b2-a727-7bec90ac7ffc Total devices 1 FS bytes used 3.59TiB devid 1 size 3.64TiB used 3.64TiB path /dev/sdo1 Label: none uuid: ff935007-27b4-4f7d-bd4a-a10f51378c2e Total devices 1 FS bytes used 4.91TiB devid 1 size 5.46TiB used 5.30TiB path /dev/sdm1 Label: none uuid: 78c765d7-2deb-4b38-9c10-38aab5010095 Total devices 1 FS bytes used 3.63TiB devid 1 size 3.64TiB used 3.64TiB path /dev/sdu1 Label: none uuid: c88e45ff-c3d4-4f09-bc8d-4bdf278276e5 Total devices 1 FS bytes used 3.54TiB devid 1 size 3.64TiB used 3.63TiB path /dev/sdb1 Label: none uuid: 1b9ebae0-3615-46ce-bfdc-8a270627d8e0 Total devices 1 FS bytes used 3.55TiB devid 1 size 3.64TiB used 3.63TiB path /dev/sdi1 Label: none uuid: 116771a4-95d5-4652-bd70-5c0cc91a1ed2 Total devices 1 FS bytes used 4.65TiB devid 1 size 5.46TiB used 5.32TiB path /dev/sdn1 Label: none uuid: 34cb677f-7eca-402f-84cb-83f1f5ce62f6 Total devices 1 FS bytes used 3.58TiB devid 1 size 3.64TiB used 3.62TiB path /dev/sdv1 Label: none uuid: 12d032f0-1aa2-46a3-803f-d03eeb92ef01 Total devices 1 FS bytes used 3.61TiB devid 1 size 3.64TiB used 3.62TiB path /dev/sdc1 Label: none uuid: b199aedb-7759-4e01-8636-ceaa7d9046e4 Total devices 1 FS bytes used 4.73TiB devid 1 size 5.46TiB used 5.28TiB path /dev/sdt1 Label: none uuid: 79583828-3bbe-47ca-a853-8d1d615bbc8f Total devices 1 FS bytes used 2.71TiB devid 1 size 2.73TiB used 2.73TiB path /dev/sdj1 Label: none uuid: e31dc21e-2eaf-4ed2-b01f-53fc666ab0f4 Total devices 1 FS bytes used 3.66TiB devid 1 size 5.46TiB used 4.47TiB path /dev/sdh1 Label: none uuid: e0463d61-dda3-473c-a877-dd088873bc3b Total devices 1 FS bytes used 3.62TiB devid 1 size 3.64TiB used 3.64TiB path /dev/sdp1

I tried to unsuccessfully add a drive to the pool hoping to recover the pool. I am now faced with Wrong Pool State - cache invalid expansion

Currently my cache is unmounable, preventing me from starting the array again. I would love to recover my cache pool, but everthing I try is not an acceptable move in unraid. If I remove the cache pool, would I be able to add a fresh pool and copy the date from the old drives, or is this process a one way data loss? At this point, it looks like I need to rectify my cache pool issue before I will be able re-start my array. Thanks again for any guidance you may be able to provide.

Looking for some guidance on next steps. I was having a bunch of docker issues on my system. Randomly stopping, not starting, certain containers acting flaky. In any case, I decided to delete the vDisk and after reboot my cache pool turned up with an "unmountable" message. I am hoping someone can point me in the next best course of steps. i have attached Diagnostics below. Thanks in advance for some guidance here. Sorry if this is in the wrong bucket. tower-diagnostics-20250727-1735.zip