Hmm, well I thought it could possibly be a bug but I'm not quite sure because it only seems to happen when the machine is cold. Not sure how that could make a difference to software. Also, my log is slightly different from those links. Specifically the part about:
"ata1: link online but device misclassified, retrying"
Googling that doesn't turn up much at all. And also sometimes when it happens it'll log exception details like...
Dec 1 11:22:28 pandora kernel: [ 735.000049] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
Dec 1 11:22:28 pandora kernel: [ 735.000061] ata1.00: cmd 35/00:08:8d:94:c9/00:00:14:00:00/e0 tag 0 dma 4096 out
Dec 1 11:22:28 pandora kernel: [ 735.000063] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
Dec 1 11:22:28 pandora kernel: [ 735.000067] ata1.00: status: { DRDY }
Dec 1 11:22:28 pandora kernel: [ 735.000075] ata1: hard resetting link
Dec 1 11:22:33 pandora kernel: [ 740.512011] ata1: link is slow to respond, please be patient (ready=0)
Dec 1 11:22:38 pandora kernel: [ 745.048015] ata1: SRST failed (errno=-16)
Dec 1 11:22:38 pandora kernel: [ 745.058743] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
Dec 1 11:22:38 pandora kernel: [ 745.058753] ata1: link online but device misclassified, retrying
Dec 1 11:22:38 pandora kernel: [ 745.058759] ata1: hard resetting link
...
and other times when it happens it will omit the Emask stuff all together. Very strange.
From what I understand (I may be wrong) the log seems to indicate that the controller is loosing communication with the drive. I would love for it to just be a bug though. Ugh, it's so hard to diagnose this sort of thing :mad:
I should also mention that this problem seemed slightly worse under Hardy. It would occur when booting. Under Intrepid, it occurs about 30 - 60secs after I get to my desktop. That might be because Intrepid seems to boot a little faster tho... It also occurs with Fedora 10.
The output from sudo lshw -C disk gives:
*-disk
description: ATA Disk
product: WDC WD5000AAKS-7
vendor: Western Digital
physical id: 0
bus info: scsi@0:0.0.0
logical name: /dev/sda
version: 12.0
serial: WD-WCAS87066186
size: 465GiB (500GB)
capabilities: partitioned partitioned:dos
configuration: ansiversion=5 signature=08000000
*-cdrom
description: DVD writer
product: DVD+-RW GSA-H73N
vendor: HL-DT-ST
physical id: 1
bus info: scsi@1:0.0.0
logical name: /dev/cdrom
logical name: /dev/cdrw
logical name: /dev/dvd
logical name: /dev/dvdrw
logical name: /dev/scd0
logical name: /dev/sr0
version: B103
serial: [HL-DT-STDVD+-RW GSA-H73NB10307/06/27 7U02
capabilities: removable audio cd-r cd-rw dvd dvd-r
configuration: ansiversion=5 status=nodisc