My ZFS pool consists of two mirrored disks. I have two more disks which I plan to use for rotating offsite backups. The first backup disk was added to the zpool and has nearly completed resilvering.
My question is: if I remove the resilvered backup disk from the machine can I
dd it to the second backup disk, and have the resulting disk work as-expected when it's added back into the pool during its rotation?
dd would be quite a bit faster than resilvering which is the main reason I'm thinking of doing it (the pool is nearly full and contains a large number of small files).