Moving From 2 External Drives (RAID 1) to Enclosure With 3 Bigger Drives
I’ve currently got a Raid1 volume built on 2 external drives.
I want to move that volume to an external enclosure with 3 bigger disks and increase the volume size.
Can you confirm that this is the correct process?
install enclosure and 1 drive, certify drive, add drive to Raid1 volume as 3rd mirror
Wait for the mirror to sync
install 2nd enclosure drive, certify
remove secondary external drive from mirror
add 2nd enclosure drive to mirror, wait for sync
make one of the enclosure drives the primary
install 3rd enclosure drive, certify
remove final external (old primary) drive from volume
add 3rd enclosure drive to mirror, wait for sync
Certify all the drives at the same time. It takes the same time to certify one, as three.
Other than that, you have it understood.
Aaarrgh - no, it won't work, this is an APFS volume and it looks as if you can't resize those :-(