To check zpool status

zpool status [<volume>]

To clear error on drive, which you think reported wrongly.

zpool clear <volume name>

To add Zeus Drive

zpool add performance log <drive>

Adding spare to volume

zpool add performance spare <drive>

Remove attached spare drive to volume

zpool detach <volume> <Drive>

Removing drives from volume (require to remove spare drives after raid rebuilt)

zpool remove <Volume> <Drive>