Hi,
mdadm raid contains 6 hard disks, in that now mdadm shows 2 is activ sync and other 4 shows removed. Any one can help on this same and thanks in advance.
Srinivas
Details as follows:
# mdadm --detail /dev/md0
mdadm: md device /dev/md0 does not appear to be active.
#cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md0 : inactive sdb1[4](S) sda1[5](S) sdd1[3](S) sdg1[2](S) sdf1[1](S) sde1[0](S)
5860559616 blocks
#mdadm -QE --scan
ARRAY /dev/md0 level=raid5 num-devices=6 UUID=7395e18d:4088dc27:bd9f1658:0a1d2015
#mdadm -As /dev/md0
mdadm: /dev/md0 assembled from 2 drives - not enough to start the array.
#cat /etc/mdadm/mdadm.conf
DEVICE partitions
ARRAY /dev/md0 level=raid5 num-devices=6 metadata=0.90 spares=1 UUID=7395e18d:4088dc27:bd9f1658:0a1d2015
Note: I am not able to see "devices= /dev/sdg1,/dev/sdf1,/dev/sde1,/dev/sdd1,/dev/sdb1,/dev/sda1" and "auto=yes" in the "/etc/mdadm/mdadm.conf" file
-- initial RAID devices as follows:
0 /dev/sde1
1 /dev/sdf1
2 /dev/sdg1
3 /dev/sdd1
4 /dev/sdb1
5 /dev/sda1
#mdadm --detail /dev/md0
/dev/md0:
Version : 00.90
Creation Time : Sun Jun 7 11:29:40 2009
Raid Level : raid5
Used Dev Size : 976759936 (931.51 GiB 1000.20 GB)
Raid Devices : 6
Total Devices : 2
Preferred Minor : 0
Persistence : Superblock is persistent
Update Time : Mon Aug 17 08:16:35 2009
State : active, degraded, Not Started
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 64K
UUID : 7395e18d:4088dc27:bd9f1658:0a1d2015
Events : 0.650340
Number Major Minor RaidDevice State
0 0 0 0 removed
1 0 0 1 removed
2 0 0 2 removed
3 0 0 3 removed
4 8 17 4 active sync /dev/sdb1
5 8 1 5 active sync /dev/sda1
#mdadm -R /dev/md0
mdadm: failed to run array /dev/md0: Input/output error
# mdadm -E /dev/sda1
/dev/sda1:
Magic : a92b4efc
Version : 00.90.00
UUID : 7395e18d:4088dc27:bd9f1658:0a1d2015
Creation Time : Sun Jun 7 11:29:40 2009
Raid Level : raid5
Used Dev Size : 976759936 (931.51 GiB 1000.20 GB)
Array Size : 4883799680 (4657.55 GiB 5001.01 GB)
Raid Devices : 6
Total Devices : 6
Preferred Minor : 0
Update Time : Mon Aug 17 08:16:35 2009
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 3
Spare Devices : 0
Checksum : f4088e0f - correct
Events : 650340
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 5 8 1 5 active sync /dev/sda1
0 0 0 0 0 removed
1 1 0 0 1 faulty removed
2 2 0 0 2 faulty removed
3 3 0 0 3 faulty removed
4 4 8 17 4 active sync /dev/sdb1
5 5 8 1 5 active sync /dev/sda1
# mdadm -E /dev/sdb1
/dev/sdb1:
Magic : a92b4efc
Version : 00.90.00
UUID : 7395e18d:4088dc27:bd9f1658:0a1d2015
Creation Time : Sun Jun 7 11:29:40 2009
Raid Level : raid5
Used Dev Size : 976759936 (931.51 GiB 1000.20 GB)
Array Size : 4883799680 (4657.55 GiB 5001.01 GB)
Raid Devices : 6
Total Devices : 6
Preferred Minor : 0
Update Time : Mon Aug 17 08:16:35 2009
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 3
Spare Devices : 0
Checksum : f4088e1d - correct
Events : 650340
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 4 8 17 4 active sync /dev/sdb1
0 0 0 0 0 removed
1 1 0 0 1 faulty removed
2 2 0 0 2 faulty removed
3 3 0 0 3 faulty removed
4 4 8 17 4 active sync /dev/sdb1
5 5 8 1 5 active sync /dev/sda1
# mdadm -E /dev/sdd1
/dev/sdd1:
Magic : a92b4efc
Version : 00.90.00
UUID : 7395e18d:4088dc27:bd9f1658:0a1d2015
Creation Time : Sun Jun 7 11:29:40 2009
Raid Level : raid5
Used Dev Size : 976759936 (931.51 GiB 1000.20 GB)
Array Size : 4883799680 (4657.55 GiB 5001.01 GB)
Raid Devices : 6
Total Devices : 6
Preferred Minor : 0
Update Time : Mon Aug 17 08:15:41 2009
State : clean
Active Devices : 6
Working Devices : 6
Failed Devices : 0
Spare Devices : 0
Checksum : f4088db3 - correct
Events : 650334
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 3 8 49 3 active sync /dev/sdd1
0 0 8 65 0 active sync /dev/sde1
1 1 8 81 1 active sync /dev/sdf1
2 2 8 97 2 active sync /dev/sdg1
3 3 8 49 3 active sync /dev/sdd1
4 4 8 17 4 active sync /dev/sdb1
5 5 8 1 5 active sync /dev/sda1
#dm -E /dev/sde1
/dev/sde1:
Magic : a92b4efc
Version : 00.90.00
UUID : 7395e18d:4088dc27:bd9f1658:0a1d2015
Creation Time : Sun Jun 7 11:29:40 2009
Raid Level : raid5
Used Dev Size : 976759936 (931.51 GiB 1000.20 GB)
Array Size : 4883799680 (4657.55 GiB 5001.01 GB)
Raid Devices : 6
Total Devices : 6
Preferred Minor : 0
Update Time : Mon Aug 17 08:15:41 2009
State : clean
Active Devices : 6
Working Devices : 6
Failed Devices : 0
Spare Devices : 0
Checksum : f4088dbd - correct
Events : 650334
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 0 8 65 0 active sync /dev/sde1
0 0 8 65 0 active sync /dev/sde1
1 1 8 81 1 active sync /dev/sdf1
2 2 8 97 2 active sync /dev/sdg1
3 3 8 49 3 active sync /dev/sdd1
4 4 8 17 4 active sync /dev/sdb1
5 5 8 1 5 active sync /dev/sda1
# mdadm -E /dev/sdf1
/dev/sdf1:
Magic : a92b4efc
Version : 00.90.00
UUID : 7395e18d:4088dc27:bd9f1658:0a1d2015
Creation Time : Sun Jun 7 11:29:40 2009
Raid Level : raid5
Used Dev Size : 976759936 (931.51 GiB 1000.20 GB)
Array Size : 4883799680 (4657.55 GiB 5001.01 GB)
Raid Devices : 6
Total Devices : 6
Preferred Minor : 0
Update Time : Mon Aug 17 08:15:41 2009
State : clean
Active Devices : 6
Working Devices : 6
Failed Devices : 0
Spare Devices : 0
Checksum : f4088dcf - correct
Events : 650334
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 1 8 81 1 active sync /dev/sdf1
0 0 8 65 0 active sync /dev/sde1
1 1 8 81 1 active sync /dev/sdf1
2 2 8 97 2 active sync /dev/sdg1
3 3 8 49 3 active sync /dev/sdd1
4 4 8 17 4 active sync /dev/sdb1
5 5 8 1 5 active sync /dev/sda1
# mdadm -E /dev/sdg1
/dev/sdg1:
Magic : a92b4efc
Version : 00.90.00
UUID : 7395e18d:4088dc27:bd9f1658:0a1d2015
Creation Time : Sun Jun 7 11:29:40 2009
Raid Level : raid5
Used Dev Size : 976759936 (931.51 GiB 1000.20 GB)
Array Size : 4883799680 (4657.55 GiB 5001.01 GB)
Raid Devices : 6
Total Devices : 6
Preferred Minor : 0
Update Time : Mon Aug 17 08:15:41 2009
State : clean
Active Devices : 6
Working Devices : 6
Failed Devices : 0
Spare Devices : 0
Checksum : f4088de1 - correct
Events : 650334
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 2 8 97 2 active sync /dev/sdg1
0 0 8 65 0 active sync /dev/sde1
1 1 8 81 1 active sync /dev/sdf1
2 2 8 97 2 active sync /dev/sdg1
3 3 8 49 3 active sync /dev/sdd1
4 4 8 17 4 active sync /dev/sdb1
5 5 8 1 5 active sync /dev/sda1
