zfs-resize.txt

``` bash
[~/tmp]$ ls -lh j1 j2 z1 z2
-rw-r--r--  1 daniel  daniel   174M Apr 10 13:11 j1
-rw-r--r--  1 daniel  daniel   174M Apr 10 13:11 j2
-rw-r--r--  1 daniel  daniel   731M Apr 10 13:10 z1
-rw-r--r--  1 daniel  daniel   731M Apr 10 13:10 z2

$ sudo zpool create ztest mirror (pwd)/j1 (pwd)/j2

$ sudo zpool set autoexpand=on ztest

[~/tmp]$ zpool status ztest
  pool: ztest
 state: ONLINE
  scan: none requested
config:

        NAME                         STATE     READ WRITE CKSUM
        ztest                        ONLINE       0     0     0
          mirror-0                   ONLINE       0     0     0
            /usr/home/daniel/tmp/j1  ONLINE       0     0     0
            /usr/home/daniel/tmp/j2  ONLINE       0     0     0

errors: No known data errors

[~/tmp]$ zfs list ztest
NAME    USED  AVAIL  REFER  MOUNTPOINT
ztest  74.5K   128M    19K  /ztest

[~/tmp]$ sudo zpool replace -f ztest (pwd)/j2 (pwd)/z2
[~/tmp]$ sudo zpool replace -f ztest (pwd)/j1 (pwd)/z1

[~/tmp]$ zfs list ztest
NAME    USED  AVAIL  REFER  MOUNTPOINT
ztest  86.5K   688M    19K  /ztest

can create your own files with dd if=/dev/random of=j2 bs=1m count=1 for example