zpool add tank /dev/labal/zil でintent logディスクを追加したら fsync()したときにディスクがガリガリいわなくなってうれしいんだが いちど付けたら外せないのか?
zpool remove tank log /dev/label/zil -> cannot remove log: no such device in pool cannot remove /dev/label/zil: only inactive hot spares or cache devices can be removed
zpool detach tank log /dev/label/zil ->cannot detach log: no such device in pool
zpool remove tank /dev/label/zil -> cannot remove /dev/label/zil: only inactive hot spares or cache devices can be removed
zpool detach tank /dev/label/zil -> cannot detach /dev/label/zil: only applicable to mirror and replacing vdevs
