列出当前所有所有的 Pool

$ zpool list
NAME        SIZE  ALLOC   FREE  CKPOINT  EXPANDSZ   FRAG    CAP  DEDUP    HEALTH  ALTROOT
SWPool     16.4T  2.35T  14.0T        -         -     0%    14%  1.00x    ONLINE  /mnt
SWPoolSSD  1.86T   142G  1.72T        -         -     0%     7%  1.00x    ONLINE  /mnt
boot-pool   103G  1.18G   102G        -         -     0%     1%  1.00x    ONLINE  -

查看 Pool 的读写状态

# 每一秒更新一次所有 Pool 的读写状态
$ zpool iostat -n 1
              capacity     operations     bandwidth
pool        alloc   free   read  write   read  write
----------  -----  -----  -----  -----  -----  -----
SWPool      2.35T  14.0T     11     19  4.59M   296K
SWPoolSSD    142G  1.72T      6     13   722K   175K
boot-pool   1.18G   102G      0      1  2.64K   204K
----------  -----  -----  -----  -----  -----  -----

# 每一秒更新一次指定 Pool 的读写状态
$ zpool iostat SWPoolSSD -n 1
              capacity     operations     bandwidth
pool        alloc   free   read  write   read  write
----------  -----  -----  -----  -----  -----  -----
SWPoolSSD    142G  1.72T      6     13   738K   176K
SWPoolSSD    142G  1.72T      0      0      0      0

查看特定 Pool 健康状态

You can quickly review pool health status by using the zpool status command as follows:

$ zpool status -x
all pools are healthy

$ zpool status -v <pool name>
  pool: tank
 state: DEGRADED
status: One or more devices could not be opened.  Sufficient replicas exist for
        the pool to continue functioning in a degraded state.
action: Attach the missing device and online it using 'zpool online'.
   see: http://www.sun.com/msg/ZFS-8000-2Q
 scrub: scrub completed after 0h0m with 0 errors on Wed Jan 20 15:13:59 2010
config:

        NAME        STATE     READ WRITE CKSUM
        tank        DEGRADED     0     0     0
          mirror-0  DEGRADED     0     0     0
            c1t0d0  ONLINE       0     0     0
            c1t1d0  UNAVAIL      0     0     0  cannot open

errors: No known data errors

CRUD

Deleting a ZPool

Deleting a zpool and deleting all data within the zpool:

zpool destroy nameofzpool

Removing a Zpool

If you have a zpool on eg a usb drive, this command will allow you to safely remove it:

zpool export nameofzpool

If you want to import the zpool again:

zpool import nameofzpool

Running zpool import with no arguments will list all available zpools.

Creating a Zpool on a disk image

Though not recommended for normal use, it is possible to create a zpool on top of a file.

dd if=/dev/zero of=filename.img bs=1M count=1000
zpool create nameofzpool /absolute/path/to/filename.img

will create an image of 1GB. It is also possible to create a sparse image, to create an image that can hold 100GB:

dd if=/dev/zero of=filename.img bs=1k count=1 seek=100M

ZVol

Resize

$ zfs set volsize=new_size tank/name_of_the_zvol

Verify

$ zfs get volsize SSDPool2/VM/Ubuntu2
NAME                 PROPERTY  VALUE    SOURCE
SSDPool2/VM/Ubuntu2  volsize   200G     local

$ zfs list SSDPool2/VM/Ubuntu2
NAME                  USED  AVAIL     REFER  MOUNTPOINT
SSDPool2/VM/Ubuntu2  18.3G   774G     9.94G  -

【TrueNAS】ZFS 管理