I have a one-drive zfs pool named data on my desktop computer, created with something like
zpool create data /dev/mapper/data (zfs on luks). I would like to convert it into a raid1 pool, but only have 1 more drive to play with, and one more slot in my machine.
Can I somehow tell zfs to convert my data pool into a mirror, using the new drive as the 2nd drive in the set?
If that is not possible, is there a way to create a new degraded mirror pool using just the new drive (since I don't have a 2nd drive yet)? That would give me a chance to copy my data from the old pool into the new mirror pool, then add the original drive to the new pool.