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ZPOOL-ADD(8) System Manager's Manual ZPOOL-ADD(8) NAME zpool-add -- add vdevs to ZFS storage pool SYNOPSIS zpool add [-fgLnP] [--allow-in-use--allow-replication-mismatch--allow-ashift-mismatch] [-o property=value] pool vdev DESCRIPTION Adds the specified virtual devices to the given pool. The vdev speci- fication is described in the Virtual Devices section of zpoolconcepts(7). The behavior of the -f option, and the device checks performed are described in the zpool create subcommand. -f Forces use of vdevs, even if they appear in use, have conflict- ing ashift values, or specify a conflicting replication level. Not all devices can be overridden in this manner. -g Display vdev, GUIDs instead of the normal device names. These GUIDs can be used in place of device names for the zpool de- tach/offline/remove/replace commands. -L Display real paths for vdevs resolving all symbolic links. This can be used to look up the current block device name re- gardless of the /dev/disk path used to open it. -n 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. -P Display real paths for vdevs instead of only the last component of the path. This can be used in conjunction with the -L flag. -o property=value 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. --allow-ashift-mismatch Disable the ashift validation which allows mismatched ashift values in the pool. Adding top-level vdevs with different sec- tor sizes will prohibit future device removal operations, see zpool-remove(8). --allow-in-use Allow vdevs to be added even if they might be in use in another pool. --allow-replication-mismatch Allow vdevs with conflicting replication levels to be added to the pool. EXAMPLES Example 1: Adding a Mirror to a ZFS Storage Pool The following command adds two mirrored disks to the pool tank, assum- ing the pool is already made up of two-way mirrors. The additional space is immediately available to any datasets within the pool. # zpool add tank mirror sda sdb Example 2: Adding Cache Devices to a ZFS Pool The following command adds two disks for use as cache devices to a ZFS storage pool: # zpool add pool cache sdc sdd 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 us- ing the iostat subcommand as follows: # zpool iostat -v pool 5 SEE ALSO zpool-attach(8), zpool-import(8), zpool-initialize(8), zpool-online(8), zpool-remove(8) FreeBSD 14.3 March 8, 2024 ZPOOL-ADD(8)
NAME | SYNOPSIS | DESCRIPTION | EXAMPLES | SEE ALSO
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