I have a brand new CentOS 6.5 install with two (mounted to /mnt/data) 1tb Western Digital Black drives in raid 1 with mdadm, configured via the installer. Unfortunately every now and again the entire system kernel panics with a trace similar to below:
Any tips on diagnosing or fixing this? Much appreciated!
EDIT: It appears this happened around the same time as a raid data check occured: EDIT 2: The last two crashes have happened at just past 1am Sunday, same time data check occurs.
Mar 23 01:00:02 beta kernel: md: data-check of RAID array md0 Mar 23 01:00:02 beta kernel: md: minimum _guaranteed_ speed: 1000 KB/sec/disk. Mar 23 01:00:02 beta kernel: md: using maximum available idle IO bandwidth (but not more than 200000 KB/sec) for data-check. Mar 23 01:00:02 beta kernel: md: using 128k window, over a total of 976629568k.
Personalities : [raid1] md0 : active raid1 sdc1 sdb1 976629568 blocks super 1.1 [2/2] [UU] bitmap: 0/8 pages [0KB], 65536KB chunk unused devices: <none>
/dev/md0: Version : 1.1 Creation Time : Fri Mar 7 16:07:17 2014 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 Intent Bitmap : Internal Update Time : Sun Mar 23 03:36:59 2014 State : active Active Devices : 2 Working Devices : 2 Failed Devices : 0 Spare Devices : 0 Name : beta.fmt2.spigot-servers.net:0 (local to host beta.fmt2.spigot-servers.net) UUID : 89a86538:f6162473:d5e0524c:b80566d6 Events : 1728 Number Major Minor RaidDevice State 0 8 17 0 active sync /dev/sdb1 1 8 33 1 active sync /dev/sdc1
EDIT 3: Different crash, occurred during a forced resync / check, also memtest passed 4 passes just fine: http://files.md-5.net/s/X3Hi.png
EDIT 4: Even dd is causing crashes: http://files.md-5.net/s/hba2.png
EDIT 5: The SSD survives the dd torture test, guess that means I'm gonna try the drives without raid.