With no arguments, the command displays all the fields for all pools on the system. For example:
# zpool list NAME SIZE USED AVAIL CAP HEALTH ALTROOT tank 80.0G 22.3G 47.7G 28% ONLINE - dozer 1.2T 384G 816G 32% ONLINE -
This output displays the following information:
The name of the pool.
The total size of the pool, equal to the sum of the size of all top-level virtual devices.
The amount of space allocated by all datasets and internal metadata. Note that this amount is different from the amount of space as reported at the file system level.
For more information about determining available file system space, see ZFS Space Accounting.
The amount of unallocated space in the pool.
The amount of space used, expressed as a percentage of total space.
The current health status of the pool.
For more information about pool health, see Determining the Health Status of ZFS Storage Pools.
The alternate root of the pool, if any.
For more information about alternate root pools, see Using ZFS Alternate Root Pools.
# zpool list tank NAME SIZE USED AVAIL CAP HEALTH ALTROOT tank 80.0G 22.3G 47.7G 28% ONLINE -