vamythguy wrote: > I have a RAID-5 array with four SATA disks in it. Apparently, two are > going > bad, so I want to replace them. But, I'm not sure which physical > drives to > pull. Given the following: > > cat /proc/mdstat > Personalities : [raid6] [raid5] [raid4] > md0 : active raid5 sda[0] sdd[3] sdc[2] sdb[1] > 735351936 blocks level 5, 64k chunk, algorithm 2 [4/4] [UUUU] > > Any suggestions? Odd that you have the raid4 and raid6 modules loaded, but still unfamiliar with /proc/mdstat... Anyways, you are showing an array with four working disks; none failed. If you had a failed drive, it might look like [U_UU] which would mean the second disk had failed. ../C