zpool with single z3 vdev

test-zfs

root@test-zfs:~# fallocate -l 1G 1
root@test-zfs:~# fallocate -l 1G 2
root@test-zfs:~# fallocate -l 1G 3
root@test-zfs:~# fallocate -l 1G 4
root@test-zfs:~# l
1  2  3  4
root@test-zfs:~# ls -lah
total 4.1G
drwx------  4 root root 4.0K Mar 16 02:16 .
drwxr-xr-x 23 root root 4.0K Mar 16 02:05 ..
-rw-r--r--  1 root root 1.0G Mar 16 02:16 1
-rw-r--r--  1 root root 1.0G Mar 16 02:16 2
-rw-r--r--  1 root root 1.0G Mar 16 02:16 3
-rw-r--r--  1 root root 1.0G Mar 16 02:16 4
root@test-zfs:~# zpool create test raidz3 ~/1 ~/2 ~/3 ~/4
root@test-zfs:~# zfs list
NAME   USED  AVAIL  REFER  MOUNTPOINT
test    55K   984M    19K  /test
root@test-zfs:~# zpool status
  pool: test
 state: ONLINE
  scan: none requested
config:

	NAME         STATE     READ WRITE CKSUM
	test         ONLINE       0     0     0
	  raidz3-0   ONLINE       0     0     0
	    /root/1  ONLINE       0     0     0
	    /root/2  ONLINE       0     0     0
	    /root/3  ONLINE       0     0     0
	    /root/4  ONLINE       0     0     0

errors: No known data errors
root@test-zfs:~# zpool list test
NAME   SIZE  ALLOC   FREE  EXPANDSZ   FRAG    CAP  DEDUP  HEALTH  ALTROOT
test  3.97G   256K  3.97G         -     0%     0%  1.00x  ONLINE  -
root@test-zfs:~# zpool history -i test
History for 'test':
2017-03-16.02:18:59 [txg:5] create pool version 5000; software version 5000/5; uts test-zfs 4.8.0-41-generic #44-Ubuntu SMP Fri Mar 3 15:27:17 UTC 2017 x86_64
2017-03-16.02:18:59 zpool create test raidz3 /root/1 /root/2 /root/3 /root/4
root@test-zfs:~# zpool get all test
NAME  PROPERTY                    VALUE                       SOURCE
test  size                        3.97G                       -
test  capacity                    0%                          -
test  altroot                     -                           default
test  health                      ONLINE                      -
test  guid                        13866027544141343344        default
test  version                     -                           default
test  bootfs                      -                           default
test  delegation                  on                          default
test  autoreplace                 off                         default
test  cachefile                   -                           default
test  failmode                    wait                        default
test  listsnapshots               off                         default
test  autoexpand                  off                         default
test  dedupditto                  0                           default
test  dedupratio                  1.00x                       -
test  free                        3.97G                       -
test  allocated                   256K                        -
test  readonly                    off                         -
test  ashift                      0                           default
test  comment                     -                           default
test  expandsize                  -                           -
test  freeing                     0                           default
test  fragmentation               0%                          -
test  leaked                      0                           default
test  feature@async_destroy       enabled                     local
test  feature@empty_bpobj         enabled                     local
test  feature@lz4_compress        active                      local
test  feature@spacemap_histogram  active                      local
test  feature@enabled_txg         active                      local
test  feature@hole_birth          active                      local
test  feature@extensible_dataset  enabled                     local
test  feature@embedded_data       active                      local
test  feature@bookmarks           enabled                     local
test  feature@filesystem_limits   enabled                     local
test  feature@large_blocks        enabled                     local