March 2, 20215 yr Hi, I updated to 6.9 stable today and I tried taking advantage of multiple pools and tried removing 2 of my 4 SSDs from the cache pool. I spun down the array, reset the config for the cache pool and removed the bottom two drives, but did not bring the number of the cache pool down. Upon booting back up, I am constantly getting the "Unmountable: No pool uuid" error across all of my cache drives, even after readding the two removed drives. I tried looking up the error but the one forum post I could find with this error wasn't all that helpful for my scenario. Is anyone able to give me a solution? Thanks! sol-diagnostics-20210302-1848.zip
March 2, 20215 yr Community Expert 18 minutes ago, Phillycj said: reset the config for the cache pool and removed the bottom two drives Not quite clear what you mean by this, did the pool have data? You can't remove two devices at once and maintain data.
March 2, 20215 yr Author 1 minute ago, JorgeB said: Not quite clear what you mean by this, did the pool have data? You can't remove two devices at once and maintain data. The pool has data, yes. I have not attempted to format any of the drives yet.
March 2, 20215 yr Community Expert 3 minutes ago, Phillycj said: I have not attempted to format any of the drives yet. But you unassigned two cache devices and started the array, so they were both wiped: Mar 2 18:40:43 Sol emhttpd: shcmd (1232): /sbin/wipefs -a /dev/sde1 ... Mar 2 18:40:43 Sol emhttpd: shcmd (1234): /sbin/wipefs -a /dev/sdf1 And like mentioned you can' remove two devices at the same time and keep the pool, it needs to be one device at a time (assuming a raid1 or raid10 pool).
March 2, 20215 yr Author 6 minutes ago, JorgeB said: But you unassigned two cache devices and started the array, so they were both wiped: Mar 2 18:40:43 Sol emhttpd: shcmd (1232): /sbin/wipefs -a /dev/sde1 ... Mar 2 18:40:43 Sol emhttpd: shcmd (1234): /sbin/wipefs -a /dev/sdf1 And like mentioned you can' remove two devices at the same time and keep the pool, it needs to be one device at a time (assuming a raid1 or raid10 pool). If just the file system on the two drives was wiped, is there any way to restore the fs on these drives while keeping the contents intact?
March 2, 20215 yr Community Expert Very possibly, but beyond my knowledge, you can likley find some help for that using #btrfs on freenode IRC.
March 2, 20215 yr Author Just now, JorgeB said: Very possibly, but beyond my knowledge, you can likley find some help for that using #btrfs on freenode IRC. Great, thanks for the help!
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