I have a server running ubuntu server, after a crash, I lost a Disc.Here is the output:cat /proc/mdstatPersonalities : [raid1] [linear] [multipath] [raid0] [raid6] [raid5]      [raid4] [raid10]md0 : active raid1 cciss/c0d0p1[0] cciss/c0d1p1[1] cciss/c0d2p1[2]  489856 blocks [3/3] [UUU] md2 : active raid1 cciss/c0d0p3[0] cciss/c0d1p3[1] cciss/c0d2p3[2]  138938048 blocks [3/3] [UUU] md1 : active raid1 cciss/c0d0p2[0] cciss/c0d1p2[1] cciss/c0d2p2[2]  3903680 blocks [3/3] [UUU]md3 : inactive cciss/c0d5p1[2](S) cciss/c0d3p1[0](S) cciss/c0d4p1[1](S) cciss/c0d6p1[3](S)  573327104 blockscat /etc/mdadm/mdadm.conf# mdadm.conf## Please refer to mdadm.conf(5) for information about this file.## by default, scan all partitions (/proc/partitions) for MD superblocks.# alternatively, specify devices to scan, using wildcards if desired.DEVICE partitions# auto-create devices with Debian standard permissionsCREATE owner=root group=disk mode=0660 auto=yes# automatically tag new arrays as belonging to the local systemHOMEHOST <system># instruct the monitoring daemon where to send mail alertsMAILADDR root# definitions of existing MD arraysARRAY /dev/md0 level=raid1 num-devices=3  UUID=e36f9237:d7a2a830:b3dedfb7:5e31bd86ARRAY /dev/md1 level=raid1 num-devices=3 UUID=f1b3fc22:5cbadae9:c68d4e56:4c57b156ARRAY /dev/md2 level=raid1 num-devices=3 UUID=58a9609b:3132051a:018fbdf9:bef9dca9ARRAY /dev/md3 level=raid5 num-devices=5 UUID=459df1f2:70ea10af:40314e29:0652aa8c# This file was auto-generated on Thu, 07 Aug 2008 03:22:07 +0000Help
problem with the inactive RAID 5
raid;array;mdadm
Excuse me for the late reply, i found the solution by following this procedure mdadm --stop /dev/md3  thenmdadm --assemble --force /dev/md3