|System Manager's Manual
zpool-add — add
vdevs to ZFS storage pool
Adds the specified virtual devices to the given pool. The
vdev specification is described in the
Devices section of zpoolconcepts(7). The behavior
-f option, and the device checks performed
are described in the
- Forces use of vdevs, even if they appear in use or specify a conflicting replication level. Not all devices can be overridden in this manner.
- Display vdev, GUIDs instead of the normal device names. These GUIDs can be used in place of device names for the zpool detach/offline/remove/replace commands.
- Display real paths for vdevs resolving all symbolic links. This can be used to look up the current block device name regardless of the /dev/disk path used to open it.
- Displays the configuration that would be used without actually adding the vdevs. The actual pool creation can still fail due to insufficient privileges or device sharing.
- Display real paths for vdevs instead of only the
last component of the path. This can be used in conjunction with the
- Sets the given pool properties. See the zpoolprops(7) manual page for a list of valid properties that can be set. The only property supported at the moment is ashift.
The following command adds two mirrored disks to the pool tank, assuming the pool is already made up of two-way mirrors. The additional space is immediately available to any datasets within the pool.
The following command adds two disks for use as cache devices to a ZFS storage pool:
Once added, the cache devices gradually fill with content from
main memory. Depending on the size of your cache devices, it could take over
an hour for them to fill. Capacity and reads can be monitored using the
iostat subcommand as follows:
|March 16, 2022