expandsize=16.0E

[FransUrbo]

I have (and had) autoexpand=on, but still get expandsize=16.0E. I replaced
three 1.5TB disks with tree 3TB disks about a month ago, and i did get extra
space (I'm not 100% sure I got the size I had expected/should but...).

How much is this actually, and how do I know where this available
space is?

I found Illumos #1948 (ZoL pull #908), but that's closed and don't seem to have
been merged into ZoL. In that, it seems that '16E' just means undefined.. Do I
actually have free/unallocated space or not?

[FransUrbo]

Please see thread on ZoL list with the same subject for possible reason.

Gregor Kopka:
The expandsize <> 0 you see looks like an artifact (looks like small negative signed integer - maybe from mixup of partition and disk sizes - interpreted as positive MAXINT) .

[behlendorf]

Where does this stand? Is this still an issue or was it explained?

[FransUrbo]

It's still an issue.

celia:~# zpool get expandsize share
NAME   PROPERTY    VALUE     SOURCE
share  expandsize  16.0E     -

[behlendorf]

Have you manually run zpool online -e poolname vdev for the replaced vdevs? The autoexpand feature in ZoL currently doesn't yet do this automatically for you.

[FransUrbo]

I have now, and it's still 16.0E.

[behlendorf]

Somewhere it's definitely being miscalculated, we'll need to run it down.

[FransUrbo]

I can't reproduce this on my test rig with latest HEAD.

[didyouexpectthat]

I ran into this today.
I had 2 SAS disks in mirror, then I removed one of the disks so I could do some other things in that SAS channel... added the disk back to the rpool and finished resilvering, now I notice this.

root@goliath:~# zpool list rpool
NAME    SIZE  ALLOC   FREE  EXPANDSZ   FRAG    CAP  DEDUP  HEALTH  ALTROOT
rpool   832G   336G   496G     16.0E    51%    40%  1.00x  ONLINE  -
root@goliath:~# zpool get all rpool | grep expand -i
rpool  autoexpand                  off                         default
rpool  expandsize                  16.0E                       -
root@goliath:~# dpkg -l | grep zfs
ii  libzfs2                        0.6.5-pve7~jessie              amd64        Native ZFS filesystem library for Linux
ii  zfs-initramfs                  0.6.5-pve7~jessie              amd64        Native ZFS root filesystem capabilities for Linux
ii  zfsutils                       0.6.5-pve7~jessie              amd64        command-line tools to manage ZFS filesystems