On 01/04/14 19:21, Roland RoLaNd wrote:
Dear all, I'm not used to handling software raid. I've inherited a server which has raid 10 set. one of our disks failed, and it's to be replaced today. My question is; any hint how to add this new disk to the existing raid array ? first thought is :- Create identical partitions as other disks in the array i'd like to add it to.- add it to raid. Though i'm extremely worried of messing things up and wiping all my data. Any hint would be appreciated
Remember to set the "Linux raid autodetect" flag (fd) on the partition.
take a look into /proc/mdstat # cat /proc/mdstat
To adjust the speed of rebuild look here: /proc/sys/dev/raid/speed_limit_max /proc/sys/dev/raid/speed_limit_min
You can adjust them by echo-ing a new value directly into them:
# echo 1000000 > /proc/sys/dev/raid/speed_limit_max
and make that permanent by setting it in /etc/sysctl.conf
dev.raid.speed_limit_max = 1000000
when you do finally get to rebuilding the array, use 'watch' to monitor the rebuild.
# watch 'cat /proc/mdstat'
Then follow JC's exampled and you should be right.