I am very new to RAID and have a question about checking drive status. How will you know (remotely) if one fails? Obviously you will know if all of them fail, but the point of RAID is that if one fails, the other keeps going and you don't have any downtime. So, is there a way that you can check to see the status of the drives remotely (CLI)?
Im in the same boat, been setting up a raid1 today. Here's what I found out:
# cat /proc/mdstat
Personalities : [raid1]
md0 : active raid1 sdb1[1] sda1[0]
199141632 blocks [2/2] [UU]unused devices: <none>
The [UU] on the 3rd line means both devices are "up". If one of them is _ then it's down.
I tried mdadm --monitor /dev/md0 but it doesnt look like its outputting anything on mine. My question is, how do you make sure something you saved to one of the disks actually got copied to the other one? I don't want to setup my raid and hope its working then find out it wasn't when one of them dies.
Steve .===================================. | This has been a P.L.U.G. mailing. | | Don't Fear the Penguin. | | IRC: #utah at irc.freenode.net | `==================================='
