root@vm:~# zpool get feature@device_removal vmpool
NAME PROPERTY VALUE SOURCE
vmpool feature@device_removal enabled local
How can I fix this? without having to reinstall the whole system?
zpool attach rpool <single-drive> <addtional-drive>
It's not perfect with respect to performance, but if you just want to add the redundancy back:
Just add another disk the single disk vdev, so that you convert your RAID0 (so to speak) to a RAID1 (mirrored vdev):
Code:zpool attach rpool <single-drive> <addtional-drive>