Fortunately, I went through alot of this yesterday.
Your new friend is the mdadm command.
cat /proc/mdstat for a status on your raid configuration.
Personalities : [raid1]
read_ahead 1024 sectors
md5 : active raid1 sdb5[1] sda5[0]
4200896 blocks [2/2] [UU]
md6 : active raid1 sdb6[1] sda6[0]
2104384 blocks [2/2] [UU]
md7 : active raid1 sdb7[1] sda7[0]
2104384 blocks [2/2] [UU]
md2 : active raid1 sdc7[1] sdd8[2] sde5[0]
1052160 blocks [2/2] [UU]
unused devices: none
From what I know, the UU means your drives are OK.
You will see something like U_ if one of the drives is offline, more info here
http://unthought.net/Software-RAID.H...O-6.html#ss6.1
either 'man mdadm' or read here
http://gd.tuwien.ac.at/linuxcommand....es/mdadm8.html for detailed information on mdadm.
It's pretty nifty once you bring your drive back online and re-initialize the partitions, it shows rebuild status in mdstat on a percentage bar until complete. Errors are supposed to show up in log/