This question has been raised but never answered in a way that I was able to get to work.
Goal: Install Ubuntu disk 1 and move /home to a 3 disk raidz.
Progress: Installed Ubuntu with the 'experimental' zfs file system on a 1TB drive. Three 2TB drives used for zpool configured as raidz and named zhome. zfs dataset created named home.
zpool status
pool: bpool
state: ONLINE
scan: none requested
config:
NAME STATE READ WRIT CKSUM
bpool ONLINE 0 0 0
303e0a42-8a9d-6a41-87de-9eba201128bd ONLINE 0 0 0
errors: No known data errors
pool: rpool
state: ONLINE
scan: none requested
config:
NAME STATE READ WRITE CKSUM
rpool ONLINE 0 0 0
d282d21c-f3ab-c24b-bff6-846a1327654a ONLINE 0 0 0
errors: No known data errors
pool: zhome
state: ONLINE
scan: none requested
config:
NAME STATE READ WRITE CKSUM
zhome ONLINE 0 0 0
raidz1-0 ONLINE 0 0 0
wwn-0x5002538f3191984e ONLINE 0 0 0
wwn-0x500a0751e4fa5033 ONLINE 0 0 0
wwn-0x500a0751e4fa5440 ONLINE 0 0 0
errors: No known data errors
File system successfully copied from /home to zhome/home using
cp -a /home/* /zhome/home
As noted in the below link, ZFS by default rejects mount points that contain something which can be changed by setting overlay to on.
zfs set overlay=on zhome
The next step is the changing the mountpoint to /home by
zfs set mountpoint=/home zhome/home
zfs list
NAME USED AVAIL REFER MOUNTPOINT
zhome 174M 3.52T 128K /zhome
zhome/home 173M 3.52T 173M /home
df -h -t zfs
Filesystem Size Used Avail Use% Mounted on
zhome/home 3.6T 2.7G 3.6T 1% /home
zhome 3.6T 128K 3.6T 1% /zhome
All of the above accepted by my system, but on reboot, programs like stacer don't list my larger raidz, but that the system is still writing to the original /home on the 1TB drive.
I looked at this reference (Migrating /home to ZFS) which the asker was never able to get the response to work. Me neither. Some answers say add XXX to /etc/fstab while others say not necessary. I think I am close. Am I missing something?
