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Lets assume You got 4TB 6TB 5TB and 8TB drives ... just do a 4TB 1st primary partition on each of them and create a ZFS pool from that - I do not understand whe

Lets assume You got 4TB 6TB 5TB and 8TB drives ... just do a 4TB 1st primary partition on each of them and create a ZFS pool from that - I do not understand where the 'pain' is ... You can then add 1TB 2nd partition on 6TB and 5TB and 8TB drives and add another ZFS VDEV to the same pool - or create another pool. ... and You can also add 3rd partition. Also its really easy to get used drives in the same or similar size ... unless you live in some really 'hard to live' part of the world.

theshrike79 2y ago
"just" :) As far as I know you can't have mismatching drives as a single contiguous space in ZFS. Maybe it has changed. And when I want to add a new drive of a random size to extend the size of the same directory it's again a pain of adding and extending stuff.
- vermaden 2y ago
  > As far as I know you can't have mismatching drives as a single contiguous space in ZFS. Maybe it has changed. Yes you can, example below: vermaden ~ % truncate -s 1G FILE.0 vermaden ~ % truncate -s 2G FILE.1 vermaden ~ % mdconfig.sh -c FILE.0 IN: created vnode at /dev/md0 vermaden ~ % mdconfig.sh -c FILE.1 IN: created vnode at /dev/md1 vermaden ~ % lsblk md0 DEVICE MAJ:MIN SIZE TYPE LABEL MOUNT md0 2:17 1.0G zfs - - vermaden ~ % lsblk md1 DEVICE MAJ:MIN SIZE TYPE LABEL MOUNT md1 2:18 2.0G zfs - - vermaden ~ % doas zpool create test md0 md1 vermaden ~ % zpool status test pool: test state: ONLINE config: NAME STATE READ WRITE CKSUM test ONLINE 0 0 0 md0 ONLINE 0 0 0 md1 ONLINE 0 0 0 errors: No known data errors I do not know how you buy your disks but when I need to buy storage I know exactly what SIZE I want to buy - I do not just get ANY disk and then think 'how' to utilize it :) But with ZFS you have plenty of options to use disks of different sizes. Example below, RAIDZ from 4 disks of 2TB and added a mirror of two 5TB disks to the same ZFS pool. vermaden ~ % doas zpool create test raidz md{0,1,2,3} vermaden ~ % zpool status test pool: test state: ONLINE config: NAME STATE READ WRITE CKSUM test ONLINE 0 0 0 raidz1-0 ONLINE 0 0 0 md0 ONLINE 0 0 0 md1 ONLINE 0 0 0 md2 ONLINE 0 0 0 md3 ONLINE 0 0 0 errors: No known data errors vermaden ~ % doas zpool add test mirror md4 md5 vermaden ~ % zpool status test pool: test state: ONLINE config: NAME STATE READ WRITE CKSUM test ONLINE 0 0 0 raidz1-0 ONLINE 0 0 0 md0 ONLINE 0 0 0 md1 ONLINE 0 0 0 md2 ONLINE 0 0 0 md3 ONLINE 0 0 0 mirror-1 ONLINE 0 0 0 md4 ONLINE 0 0 0 md5 ONLINE 0 0 0 errors: No known data errors Hope that helps. Regards, vermaden

theshrike79 2y ago

"just" :) As far as I know you can't have mismatching drives as a single contiguous space in ZFS. Maybe it has changed. And when I want to add a new drive of a random size to extend the size of the same directory it's again a pain of adding and extending stuff.

vermaden 2y ago
> As far as I know you can't have mismatching drives as a single contiguous space in ZFS. Maybe it has changed. Yes you can, example below: vermaden ~ % truncate -s 1G FILE.0 vermaden ~ % truncate -s 2G FILE.1 vermaden ~ % mdconfig.sh -c FILE.0 IN: created vnode at /dev/md0 vermaden ~ % mdconfig.sh -c FILE.1 IN: created vnode at /dev/md1 vermaden ~ % lsblk md0 DEVICE MAJ:MIN SIZE TYPE LABEL MOUNT md0 2:17 1.0G zfs - - vermaden ~ % lsblk md1 DEVICE MAJ:MIN SIZE TYPE LABEL MOUNT md1 2:18 2.0G zfs - - vermaden ~ % doas zpool create test md0 md1 vermaden ~ % zpool status test pool: test state: ONLINE config: NAME STATE READ WRITE CKSUM test ONLINE 0 0 0 md0 ONLINE 0 0 0 md1 ONLINE 0 0 0 errors: No known data errors I do not know how you buy your disks but when I need to buy storage I know exactly what SIZE I want to buy - I do not just get ANY disk and then think 'how' to utilize it :) But with ZFS you have plenty of options to use disks of different sizes. Example below, RAIDZ from 4 disks of 2TB and added a mirror of two 5TB disks to the same ZFS pool. vermaden ~ % doas zpool create test raidz md{0,1,2,3} vermaden ~ % zpool status test pool: test state: ONLINE config: NAME STATE READ WRITE CKSUM test ONLINE 0 0 0 raidz1-0 ONLINE 0 0 0 md0 ONLINE 0 0 0 md1 ONLINE 0 0 0 md2 ONLINE 0 0 0 md3 ONLINE 0 0 0 errors: No known data errors vermaden ~ % doas zpool add test mirror md4 md5 vermaden ~ % zpool status test pool: test state: ONLINE config: NAME STATE READ WRITE CKSUM test ONLINE 0 0 0 raidz1-0 ONLINE 0 0 0 md0 ONLINE 0 0 0 md1 ONLINE 0 0 0 md2 ONLINE 0 0 0 md3 ONLINE 0 0 0 mirror-1 ONLINE 0 0 0 md4 ONLINE 0 0 0 md5 ONLINE 0 0 0 errors: No known data errors Hope that helps. Regards, vermaden