Hi everybody,
It looks like one of my disks in my RAID1 just failed:
# cat /proc/mdstat
Personalities : [raid1]
md0 : active raid1 sdc1[1](F) sdb1[0]
976629568 blocks super 1.2 [2/1] [U_]
unused devices: <none>
and
# mdadm --detail /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Sun May 17 15:21:30 2015
Raid Level : raid1
Array Size : 976629568 (931.39 GiB 1000.07 GB)
Used Dev Size : 976629568 (931.39 GiB 1000.07 GB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Update Time : Mon Aug 3 16:13:56 2015
State : clean, degraded
Active Devices : 1
Working Devices : 1
Failed Devices : 1
Spare Devices : 0
Name : eprb21:0
UUID : 0901fe50:444a29b6:d3caff14:e45ef9cc
Events : 7619
Number Major Minor RaidDevice State
0 8 17 0 active sync /dev/sdb1
1 0 0 1 removed
1 8 33 - faulty /dev/sdc1
Looks like there’s something wrong with /dev/sdc1:
# mdadm --examine /dev/sdb1
/dev/sdb1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 0901fe50:444a29b6:d3caff14:e45ef9cc
Name : eprb21:0
Creation Time : Sun May 17 15:21:30 2015
Raid Level : raid1
Raid Devices : 2
Avail Dev Size : 1953259520 (931.39 GiB 1000.07 GB)
Array Size : 976629568 (931.39 GiB 1000.07 GB)
Used Dev Size : 1953259136 (931.39 GiB 1000.07 GB)
Data Offset : 262144 sectors
Super Offset : 8 sectors
State : clean
Device UUID : 3e6d5330:3ee6ef06:2acf46ad:44513d37
Update Time : Mon Aug 3 16:14:32 2015
Checksum : d474a441 - correct
Events : 7627
Device Role : Active device 0
Array State : A. ('A' == active, '.' == missing)
and
# mdadm --examine /dev/sdc1
mdadm: No md superblock detected on /dev/sdc1.
The file system seems to be ok for the time being:
# fsck -n /dev/md0
fsck from util-linux 2.21.2
e2fsck 1.42.6 (21-Sep-2012)
Warning! /dev/md0 is mounted.
Warning: skipping journal recovery because doing a read-only filesystem check.
/dev/md0: clean, 218192/61046784 files, 213484777/244157392 blocks
Are there any other tests I could run in order to figure out what’s going on? It looks like I will have to replace /dev/sdc1 with a new hard drive. What is the correct procedure to do so without loosing my data?
Best regards, and thanks a lot,
Hans--
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