Hello everyone,
i had a power outage 2 days ago and when i came home i found my linux
box not booting up anymore. After some commands i found out that there
is a problem with a device not beeing mounted because md0 is missing.
I tried to find out what is going on, but i cannot understand what is
going on. i hope you can help me. Linux is a CentOS7.
I am posting the current status of the box below:
thank you all in advance
kind regards
Andy
[root@quad ~]# mdadm -V
mdadm - v3.4 - 28th January 2016
[root@quad ~]# uname -a
Linux quad 3.10.0-514.26.2.el7.x86_64 #1 SMP Tue Jul 4 15:04:05 UTC
2017 x86_64 x86_64 x86_64 GNU/Linux
[root@quad ~]# cat /proc/mdstat
Personalities :
unused devices: <none>
[root@quad ~]# ls -la /dev/md0
ls: cannot access /dev/md0: No such file or directory
[root@quad ~]# mdadm -Esv
ARRAY /dev/md/0 level=raid5 metadata=1.2 num-devices=4
UUID=9d020f27:c0542472:b95a18d2:5741114d name=quad.:0
devices=/dev/sda1,/dev/sdb1,/dev/sdc1,/dev/sdd1
[root@quad ~]# mdadm -A -v /dev/md0
mdadm: looking for devices for /dev/md0
mdadm: /dev/sda1 is busy - skipping
mdadm: /dev/sdb1 is busy - skipping
mdadm: /dev/sdc1 is busy - skipping
mdadm: /dev/sdd1 is busy - skipping
[root@quad ~]# cat /proc/partitions |grep -e sd[a-d]
8 32 1953514584 sdc
8 33 1953513560 sdc1
8 0 1953514584 sda
8 1 1953513560 sda1
8 16 1953514584 sdb
8 17 1953513560 sdb1
8 48 1953514584 sdd
8 49 1953513560 sdd1
[root@quad ~]# cat /etc/mdadm.conf
DEVICE /dev/sda1 /dev/sdb1 /dev/sdc1 /dev/sdd1
ARRAY /dev/md0 metadata=1.2 name=quad:0 UUID=9d020f27:c0542472:b95a18d2:5741114d
[root@quad ~]# mdadm --examine --scan
ARRAY /dev/md/0 metadata=1.2 UUID=9d020f27:c0542472:b95a18d2:5741114d
name=quad:0
[root@quad ~]# cat /etc/mdadm/mdadm.conf
ARRAY /dev/md/0 metadata=1.2 UUID=9d020f27:c0542472:b95a18d2:5741114d
name=quad:
[root@quad ~]# lsof /dev/sda*
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
multipath 607 root 10r BLK 8,0 0t0 14507 /dev/sda
[root@quad ~]# mdadm --examine /dev/sd[a-d]*
/dev/sda:
MBR Magic : aa55
Partition[0] : 3907027120 sectors at 2048 (type fd)
/dev/sda1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 9d020f27:c0542472:b95a18d2:5741114d
Name : quad:0 (local to host quad)
Creation Time : Wed Aug 20 19:28:52 2014
Raid Level : raid5
Raid Devices : 4
Avail Dev Size : 3906764976 (1862.89 GiB 2000.26 GB)
Array Size : 5860146816 (5588.67 GiB 6000.79 GB)
Used Dev Size : 3906764544 (1862.89 GiB 2000.26 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262064 sectors, after=432 sectors
State : clean
Device UUID : cee082b6:e5128634:bbaea65e:e75a2352
Update Time : Wed Aug 9 22:09:11 2017
Checksum : 9b6dc518 - correct
Events : 25456
Layout : left-symmetric
Chunk Size : 128K
Device Role : Active device 0
Array State : AAAA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdb:
MBR Magic : aa55
Partition[0] : 3907027120 sectors at 2048 (type fd)
/dev/sdb1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 9d020f27:c0542472:b95a18d2:5741114d
Name : quad:0 (local to host quad)
Creation Time : Wed Aug 20 19:28:52 2014
Raid Level : raid5
Raid Devices : 4
Avail Dev Size : 3906764976 (1862.89 GiB 2000.26 GB)
Array Size : 5860146816 (5588.67 GiB 6000.79 GB)
Used Dev Size : 3906764544 (1862.89 GiB 2000.26 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262064 sectors, after=432 sectors
State : clean
Device UUID : b217daeb:fcebf9a3:8f8fd682:3ce535c6
Update Time : Wed Aug 9 22:09:11 2017
Checksum : d87b403e - correct
Events : 25456
Layout : left-symmetric
Chunk Size : 128K
Device Role : Active device 1
Array State : AAAA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdc:
MBR Magic : aa55
Partition[0] : 3907027120 sectors at 2048 (type fd)
/dev/sdc1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 9d020f27:c0542472:b95a18d2:5741114d
Name : quad:0 (local to host quad)
Creation Time : Wed Aug 20 19:28:52 2014
Raid Level : raid5
Raid Devices : 4
Avail Dev Size : 3906764976 (1862.89 GiB 2000.26 GB)
Array Size : 5860146816 (5588.67 GiB 6000.79 GB)
Used Dev Size : 3906764544 (1862.89 GiB 2000.26 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262064 sectors, after=432 sectors
State : clean
Device UUID : f1a520b9:0894d2aa:d822db73:8dfd006b
Update Time : Wed Aug 9 22:09:11 2017
Checksum : 426a2224 - correct
Events : 25456
Layout : left-symmetric
Chunk Size : 128K
Device Role : Active device 2
Array State : AAAA ('A' == active, '.' == missing, 'R' == replacing)
/dev/sdd:
MBR Magic : aa55
Partition[0] : 3907027120 sectors at 2048 (type fd)
/dev/sdd1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 9d020f27:c0542472:b95a18d2:5741114d
Name : quad:0 (local to host quad)
Creation Time : Wed Aug 20 19:28:52 2014
Raid Level : raid5
Raid Devices : 4
Avail Dev Size : 3906764976 (1862.89 GiB 2000.26 GB)
Array Size : 5860146816 (5588.67 GiB 6000.79 GB)
Used Dev Size : 3906764544 (1862.89 GiB 2000.26 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
Unused Space : before=262064 sectors, after=432 sectors
State : clean
Device UUID : 42270e8a:deb45300:a3e5de7e:74345b99
Update Time : Wed Aug 9 22:09:11 2017
Checksum : a236c146 - correct
Events : 25456
Layout : left-symmetric
Chunk Size : 128K
Device Role : Active device 3
Array State : AAAA ('A' == active, '.' == missing, 'R' == replacing)
--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
