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zpool-offline(8) take physical devices offline in ZFS storage pool
zpool-online, zpool-offline(8) take physical devices offline in ZFS storage pool

ZPOOL-OFFLINE(8) System Manager's Manual ZPOOL-OFFLINE(8)

zpool-offlinetake physical devices offline in ZFS storage pool

zpool offline [--power|[-ft]] pool device

zpool online [--power] [-e] pool device

zpool offline [--power|[-ft]] pool device
Takes the specified physical device offline. While the device is offline, no attempt is made to read or write to the device. This command is not applicable to spares.
Power off the device's slot in the storage enclosure. This flag currently works on Linux only
Force fault. Instead of offlining the disk, put it into a faulted state. The fault will persist across imports unless the -t flag was specified.
Temporary. Upon reboot, the specified physical device reverts to its previous state.
zpool online [--power] [-e] pool device
Brings the specified physical device online. This command is not applicable to spares.
Power on the device's slot in the storage enclosure and wait for the device to show up before attempting to online it. Alternatively, you can set the environment variable to always enable this behavior. This flag currently works on Linux only
Expand the device to use all available space. If the device is part of a mirror or raidz then all devices must be expanded before the new space will become available to the pool.

zpool-detach(8), zpool-remove(8), zpool-reopen(8), zpool-resilver(8)

August 9, 2019 OpenZFS