Hi David, Am 03.12.2014 um 02:14 schrieb David McGuffey <davidmcguffey at verizion.net>: > This is an automatically generated mail message from mdadm > running on desk4 > > A DegradedArray event had been detected on md device /dev/md0. > > Faithfully yours, etc. > > P.S. The /proc/mdstat file currently contains the following: > > Personalities : [raid1] > md0 : active raid1 dm-2[1] > 243682172 blocks super 1.1 [2/1] [_U] > bitmap: 2/2 pages [8KB], 65536KB chunk > > md1 : active raid1 dm-3[0] dm-0[1] > 1953510268 blocks super 1.1 [2/2] [UU] > bitmap: 3/15 pages [12KB], 65536KB chunk the reason why one drive was kicked out (above [_U] ) will be in /var/log/messages. If it is also part of md1 then it should be manually removed from md1 before replacing the hd. -- LF