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. -- Bowie