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"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

"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

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