January 4Jan 4 I currently have a 3-ssd zfs cache living in a 4-bay usb Orico ssd enclosure. It works perfectly and has been for over a year. I decided to try to expand the cache pool to 4 disks using the new zfs 7.2.3 expansion functionality. I can add the 4th disk (it shows up as an unassigned disk as it should). I can change the pool size from 3 to 4 and assign the 4th ssd. The existing 3 ssds stay green dots, with the new fourth ssd with a blue dot. It says nothing about formatting or losing data. I try to start the array and I immediately get the "wrong pool state" error. Is there some kind of limit going to 4 disks? The example video only goes from 2 to 3 disks. Or, perhaps there is something else going on. Thanks in advance for any help.
January 5Jan 5 Author mini12-diagnostics-20260105-1332.zipThese diagnostics were done after trying to add the 4th cache disk and I got the "wrong pool state" error.
January 5Jan 5 Community Expert Pool needs to be upgraded first to support raidz expansion:https://docs.unraid.net/unraid-os/release-notes/7.2.0/#zfs-raidz-expansion
January 5Jan 5 Author Solution Not upgrading the pool was the problem. Pool upgraded and 4th ssd added successfully. Thanks for the help.
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