Hello everybody!
I have a RaidZ1 with 4 3TB disk and additional a 3TB spare disk. Can I remove the Spare Disk without any impact for the data on the RaidZ1 and can I do this on a running system? (Except that I don’t have a spare disk anymore 
)
I have found the remove command in the web interface, but I am unsure what impact this will have.
Thank you for your feedback!
Splitstone
The spare is not actually part of the raidz1, if you can confirm that it is a “spare”
Maybe post your zpool status results just to confirm.
Yes, you should be able to just remove it. I think
Thanks you for you answer!
Here is the status:
Additional I see the message “Enable all features using ‘zpool upgrade’”
Can I enable this without any concerns?
Best not to. You will disable backwark compatability.
If you ever do, do NOT do it on the boot pool.
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If you upgrade the data pool you will not be able to downgrade to Bluefin (not a problem) or Core. (Maybe a problem)
Don’t upgrade your boot pool though.