December 8, 20232 yr Hello. I had this issue a while back but ended up just creating a new pool but now I am running into the same issue so I am opening a new post. I have a ZFS pool of 2 mirrored vdevs. I am attempting to add 2 more drives to the same pool in their own mirrored vdev. Here is my current pool pool: v2main state: ONLINE config: NAME STATE READ WRITE CKSUM v2main ONLINE 0 0 0 mirror-0 ONLINE 0 0 0 sde1 ONLINE 0 0 0 sdc1 ONLINE 0 0 0 mirror-1 ONLINE 0 0 0 sdh1 ONLINE 0 0 0 sdi1 ONLINE 0 0 0 errors: No known data errors I stop the array. I change the slots from 4 to 6 under the pool. I then add both of the new drives to the new slots. When I click the on the "V2main" array it still says 2 groups of 2 drives. This field is grayed out and I am unable to change it. I also am unable to start the array until I remove the drives and change the slots back to 4. I am unable to start the array until I remove the drives from pool I know from my previous attempt that if I just add the new vdev using the zpool cli command, unraid loses its mind. Is there a way to do this from the GUI?
December 9, 20232 yr Community Expert 12 hours ago, Drew6274 said: When I click the on the "V2main" array it still says 2 groups of 2 drives. This field is grayed out and I am unable to change it. This is normal, just start the array and a new mirror vdev will automatically be added.
December 9, 20232 yr Author 8 hours ago, JorgeB said: This is normal, just start the array and a new mirror vdev will automatically be added. It will not let me start the array with the changes. With this setup in the screen shot when I try to start it, I get an error message that says "Wrong Pool State v2main - new device too small"
December 10, 20232 yr Community Expert Solution 18 hours ago, Drew6274 said: new device too small" Didn't notice before that the new drives were smaller, this is a bug with v6.12, it doesn't allow to add a new vdev with smaller capacity drives, only same size or larger, it will be fixed for v6.13, for now you can add the vdev manually then re-import the pool.
December 10, 20232 yr Author Ah, that makes sense, because this is what I was trying last time as well. I can work around this. Thanks!
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