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# Tested on RHEL 6 & 7
# Even if ZFS can use individual slices or partitions, it is recommended to use whole disks. # Having a mirrored zpool like following one POOLNAME=my_pool zpool status $POOLNAME pool: my_pool state: ONLINE scan: resilvered 65K in 0h0m with 0 errors on Tue Sep 1 16:37:43 2015 config: NAME STATE READ WRITE CKSUM my_pool ONLINE 0 0 0 mirror-0 ONLINE 0 0 0 sdb ONLINE 0 0 0 sdd ONLINE 0 0 0 mirror-1 ONLINE 0 0 0 sdc ONLINE 0 0 0 sde ONLINE 0 0 0 errors: No known data errors # we would like to detach one of the sides of the mirror DEVICE01=/dev/sdd DEVICE02=/dev/sde # We detach one by one the devices from one of the sides of the mirror: zpool detach $POOLNAME $DEVICE02 zpool status $POOLNAME pool: my_pool state: ONLINE scan: resilvered 65K in 0h0m with 0 errors on Tue Sep 1 16:37:43 2015 config: NAME STATE READ WRITE CKSUM my_pool ONLINE 0 0 0 mirror-0 ONLINE 0 0 0 sdb ONLINE 0 0 0 sdd ONLINE 0 0 0 sdc ONLINE 0 0 0 errors: No known data errors zpool detach $POOLNAME $DEVICE01 zpool status $POOLNAME pool: my_pool state: ONLINE scan: resilvered 65K in 0h0m with 0 errors on Tue Sep 1 16:37:43 2015 config: NAME STATE READ WRITE CKSUM my_pool ONLINE 0 0 0 sdb ONLINE 0 0 0 sdc ONLINE 0 0 0 errors: No known data errors |