To remove and re-add devices in a zpool, you will need to offline the disk, detach the disk, wipe the gpt partition then re-add it to pool as a new disk. This will re-silver the pool.
sgdisk -Z /dev/disk/by-id/ata-WDC_WD100EMAZ-Steps.
- zpool offline gdata wwn-0x5000cca273cf31b3
- zpool detach …
- sgdisk -Z …
- zpool attach gdata (disk-still-in-mirror-here) (new-disk /dev/disk/by-id/ata-WDC_WD100EMAZ)
