Listing Information About All Storage Pools or a Specific Pool

With no arguments, the zpool listcommand displays the following information for all pools on the system:

# zpool list
NAME                    SIZE    ALLOC   FREE    CAP  HEALTH     ALTROOT
tank                   80.0G   22.3G   47.7G    28%  ONLINE     -
dozer                   1.2T    384G    816G    32%  ONLINE     -

This command output displays the following information:

NAME

The name of the pool.

SIZE

The total size of the pool, equal to the sum of the sizes of all top-level virtual devices.

ALLOC

The amount of physical space allocated to all datasets and internal metadata. Note that this amount differs from the amount of disk space as reported at the file system level.

For more information about determining available file system space, see ZFS Disk Space Accounting.

FREE

The amount of unallocated space in the pool.

CAP (CAPACITY)

The amount of disk space used, expressed as a percentage of the total disk space.

HEALTH

The current health status of the pool.

For more information about pool health, see Determining the Health Status of ZFS Storage Pools.

ALTROOT

The alternate root of the pool, if one exists.

For more information about alternate root pools, see Using ZFS Alternate Root Pools.

You can also gather statistics for a specific pool by specifying the pool name. For example:

# zpool list tank
NAME                    SIZE    ALLOC   FREE    CAP   HEALTH     ALTROOT
tank                   80.0G    22.3G   47.7G    28%  ONLINE     -