does the *physical* order/location of drives in a mdadm-managed RAID-10 array matter?
- by locuse
i've setup a 4-drive RAID-10 array using mdadm-managed, software-raid on an x86_64 box.
it'd up & running and works as expected,
cat /proc/mdstat
md127 : active raid10 sdc2[2] sdd2[3] sda2[0] sdb2[1]
1951397888 blocks super 1.2 512K chunks 2 far-copies [4/4] [UUUU]
bitmap: 9/466 pages [36KB], 2048KB chunk
atm the four SATA drives are physically plugged into the motherboard's 1st four SATA ports.
i'd like to gather the necessary/complete info for catastrophic recovery. reading starting here, http://neil.brown.name/blog, and the mailing list, i'm not yet completely confident i have it right.
i understand 'drive order matters'. is that logical, &/or physical order that matters?
if i unplugged the four drives in this array, and plugged them each back into different ports on the motherboard or a pci card, as long as i've changed nothing in software config, will the array correctly auto-re-assemble?
