hot swapping harddrives (linux raid pt. 1)
one of the disks in my RAID1 died. it was one of the 2TB disks, so i ordered a new one off newegg. it arrived today so i spent most of the day waiting until the evening when i was done using the computer. when it came time to swap out the disk, i thought i would be daring (or an idiot).
first, i had to figure out which disk it was, this turned out to be
pretty easy. looking at
/proc/mdstat i knew it was
had failed. then i looked in
dmesg and found it was the western
digital. so that made it easy.
i opened up the case (while leaving everything still powered on and running), unplugged the WD disk, pulled it out, replaced it with the new disk.
surprisingly when i went back to my desktop,
/dev/sde was the new disk
and was completely functional. i opened up
cfdisk added a new
partition which i left as linux. since it was going to be put into a
raid, i figured the type didn’t matter (i’m also unsure if i even need
to add a partition for linux software raids).
all that was left was adding it to the raid:
sudo mdadm /dev/md1 -a /dev/sde1
and in about 4 minute’s time, i was already syncing.