Creating ZFS Pool Single Disk to Mirror
In this video I show how to install ZFS file system on Ubuntu 18.04 and configure a zpool with only one disk. Then we take that existing ZFS pool and add an additional disk to the pool to make it a mirror for some redundancy.
Install ZFS
apt install zfsutils
Create the ZFS pool
zpool create datastore sdb
Show the pool status and mount point:
zfs list
zpool status
zpool status datastore
mount -l
Check volume sizes
df -h
Add disk to existing pool and create mirror from it:
zpool attach datastore sdb sdc
Show the pool status and mount point
zfs list
zpool status