Comment 19 for bug 256637

Ubuntu 8.10 amd64:

Very similar situation here using a SATA DVD writer (HL-DT-ST DVDRAM GSA-T50N) in an Asus B50A notebook:

[ 621.408096] ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
[ 621.408120] ata2.00: cmd a0/00:00:00:08:00/00:00:00:00:00/a0 tag 0 pio 16392 in
[ 621.408123] cdb 4a 01 00 00 10 00 00 00 08 00 00 00 00 00 00 00
[ 621.408125] res 40/00:03:00:fe:00/00:00:00:00:00/a0 Emask 0x4 (timeout)
[ 621.408132] ata2.00: status: { DRDY }
[ 621.408143] ata2: hard resetting link
[ 626.768099] ata2: link is slow to respond, please be patient (ready=0)
[ 631.416089] ata2: COMRESET failed (errno=-16)
[ 631.416107] ata2: hard resetting link
[ 636.776077] ata2: link is slow to respond, please be patient (ready=0)
[ 641.424093] ata2: COMRESET failed (errno=-16)
[ 641.424111] ata2: hard resetting link
[ 646.785044] ata2: link is slow to respond, please be patient (ready=0)
[ 676.464101] ata2: COMRESET failed (errno=-16)
[ 676.464122] ata2: limiting SATA link speed to 1.5 Gbps
[ 676.464128] ata2: hard resetting link
[ 681.488077] ata2: COMRESET failed (errno=-16)
[ 681.488095] ata2: reset failed, giving up
[ 681.488100] ata2.00: disabled
[ 681.488145] ata2: EH complete

This problem also occurs in 2.6.27-4 but with a much lower frequency than in 2.6.27-7.

The HDD connected to the other SATA port works fine. The hardware is Intel based.