I am running software RAID1 on a somewhat critical server. Today I
noticed one drive is giving errors. Good thing I had RAID. I planned
on upgrading this server in next month or so. Just wandering if there
was an easy way to fix this to avoid rushing the upgrade? Having a
single drive is slowing down reads as well, I think.
Thanks.
Feb 7 15:28:28 server smartd[2980]: Device: /dev/sdb [SAT], 1
Currently unreadable (pending) sectors
Feb 7 15:28:28 server smartd[2980]: Device: /dev/sdb [SAT], 1 Offline
uncorrectable sectors
Feb 7 15:58:29 server smartd[2980]: Device: /dev/sdb [SAT], 1
Currently unreadable (pending) sectors
Feb 7 15:58:29 server smartd[2980]: Device: /dev/sdb [SAT], 1 Offline
uncorrectable sectors
[root@server ~]# smartctl -H /dev/sda
=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED
[root@server ~]# smartctl -H /dev/sdb
=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED
[root@server ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/md2 1.4T 142G 1.2T 12% /
/dev/md0 99M 37M 58M 39% /boot
tmpfs 7.9G 20K 7.9G 1% /dev/shm
[root@server ~]# cat /proc/mdstat
Personalities : [raid1]
md0 : active raid1 sdb1[1] sda1[0]
104320 blocks [2/2] [UU]
md1 : active raid1 sdb2[1] sda2[0]
8385856 blocks [2/2] [UU]
md2 : active raid1 sdb3[2](F) sda3[0]
1456645568 blocks [2/1] [U_]
unused devices: <none>
[root@server ~]# mdadm --detail /dev/md2
/dev/md2:
Version : 0.90
Creation Time : Tue Jan 4 05:39:36 2011
Raid Level : raid1
Array Size : 1456645568 (1389.17 GiB 1491.61 GB)
Used Dev Size : 1456645568 (1389.17 GiB 1491.61 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 2
Persistence : Superblock is persistent
Update Time : Fri Feb 7 15:21:45 2014
State : active, degraded
Active Devices : 1
Working Devices : 1
Failed Devices : 1
Spare Devices : 0
Events : 0.758203
Number Major Minor RaidDevice State
0 8 3 0 active sync /dev/sda3
1 0 0 1 removed
2 8 19 - faulty spare /dev/sdb3
[root@server ~]# mdadm --detail /dev/md1
/dev/md1:
Version : 0.90
Creation Time : Tue Jan 4 05:39:36 2011
Raid Level : raid1
Array Size : 8385856 (8.00 GiB 8.59 GB)
Used Dev Size : 8385856 (8.00 GiB 8.59 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 1
Persistence : Superblock is persistent
Update Time : Fri Feb 7 14:29:36 2014
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Events : 0.460
Number Major Minor RaidDevice State
0 8 2 0 active sync /dev/sda2
1 8 18 1 active sync /dev/sdb2
[root@server ~]# mdadm --detail /dev/md0
/dev/md0:
Version : 0.90
Creation Time : Tue Jan 4 05:48:17 2011
Raid Level : raid1
Array Size : 104320 (101.89 MiB 106.82 MB)
Used Dev Size : 104320 (101.89 MiB 106.82 MB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 0
Persistence : Superblock is persistent
Update Time : Wed Feb 5 11:02:25 2014
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Events : 0.460
Number Major Minor RaidDevice State
0 8 1 0 active sync /dev/sda1
1 8 17 1 active sync /dev/sdb1
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