Peter Farrow wrote:

This can be caused by overheating. If the drives are mounted close together as some chassis configurations permit, then it make sense they may both exhibit the same problem, but not necessarily simultaneously.

Are this log entries adjacent to each other?

The drives have an open slot between them and a 120mm fan right in front of them, so I don't think overheating is an issue. At one point, I shut the machine down and let it sit for an hour or so. The errors started back up immediately during the boot process when I turned it back on.

The log entries are adjacent...usually with the exact same timestamp. There are no other errors mixed in with them.

I was able to get the system to boot yesterday. It triggered a raid rebuild which finished last night. The last batch of errors happened at 4am and the system appears to be running normally now.

Here's a snip from the logs showing the errors and the rebuild: (I've cut out a few columns to shorten the lines)

---------------------------------- 22:36:21 kernel: ata3: command 0x25 timeout, stat 0x50 host_stat 0x24 22:36:21 kernel: ata3: status=0x50 { DriveReady SeekComplete } 22:36:21 kernel: Current sda: sense key No Sense 22:36:21 kernel: ata4: command 0x35 timeout, stat 0x50 host_stat 0x24 22:36:21 kernel: ata4: status=0x50 { DriveReady SeekComplete } 22:36:21 kernel: Current sdb: sense key No Sense 22:37:09 kernel: ata3: command 0x25 timeout, stat 0x50 host_stat 0x24 22:37:09 kernel: ata3: status=0x50 { DriveReady SeekComplete } 22:37:09 kernel: Current sda: sense key No Sense 22:38:03 kernel: md: md1: sync done. 22:38:03 kernel: RAID1 conf printout: 22:38:03 kernel: --- wd:2 rd:2 22:38:03 kernel: disk 0, wo:0, o:1, dev:sda2 22:38:03 kernel: disk 1, wo:0, o:1, dev:sdb2 23:25:39 kernel: ata3: command 0xca timeout, stat 0x50 host_stat 0x24 23:25:39 kernel: ata3: status=0x50 { DriveReady SeekComplete } 23:25:39 kernel: Info fld=0x662270, Current sda: sense key No Sense 23:25:39 kernel: ata4: command 0xca timeout, stat 0x50 host_stat 0x24 23:25:39 kernel: ata4: status=0x50 { DriveReady SeekComplete } 23:25:39 kernel: Info fld=0x662270, Current sdb: sense key No Sense ----------------------------------

These errors are showing ata3 and ata4 because I switched the drives to different SATA connections on the MB. These are the same drives that I showed previously with errors on ata1 and ata2.