> I considered this as well, but that's the beauty of marrying ZFS with
> a hotplug SATA backplane :)
> I chose the to use the 5-in-3 hot-swap chassis in order to give me a
> way to upgrade capacity in place, though the 4-in-3 would be as easy,
> though with higher risk.
> 1. hot-plug a new 500GB SATA disk into the 5th spot in the backplane.
> 2. zpool replace mypool c1t3d0 c1t4d0
> where c1t[0-3]d0 are my currently active 250GB drives
> 3. wait for resilver to complete.
> 4. hot-pull c1t3d0 and pull the drive from the chassis, replace with
> new 500GB drive, hot-plug back into backplane.
> 5. zpool replace mypool c1t0d0 c1t3d0
> 6. wait for resilver to complete, rinse and repeat.
> As soon as all disks have been replaced, my zpool will be 1TB, not 500GB.
Sure, that's the same process I have in mind, it's just that you have to
replace all the disks in the vdev at once to get the new capacity, so I
felt that sticking to mirrors (meaning only two disks in the vdev) was
more suitable for my expected future history.
David Dyer-Bennet, dd-b@xxxxxxxx; http://dd-b.net/
zfs-discuss mailing list