How to know which block device maps to which physical drive
- by Karolis T.
I have a server with software RAID 1, two hot-swap sata disks. One hard drive started showing errors, I'm thinking about removing and replacing it, only problem is that I have no idea which of the two correspond to which devices. And I can't shut the server down to find out.
I have /dev/sda and /dev/sdb, /dev/sda is the failing one. Thought about doing something along the lines
# mdadm --manage /dev/md0 --remove /dev/sda1
then somehow stop/suspend the drive using tuning software and try to listen which of the two stopped, but that's not gonna work in a noisy server environment. Drive panels have no LEDs.
Thanks for any ideas!