Comment 98 for bug 228302

I encountered this issue with Ubuntu 10.04 and ASRock K8SLI-eSATA2 motherboard.
=> http://www.asrock.com/mb/overview.asp?Model=K8SLI-eSATA2

The Kernel I'm using is => 2.6.32-27-generic-pae #49-Ubuntu SMP

I tried post #85's instructions, but it causes more problems than it solves...

The DVD burner is connected to PATA connector (Primary - Master). HDD is SATA

[ 0.368462] ata1.00: ATAPI: PIONEER DVD-RW DVR-108, 1.20, max UDMA/66
[ 0.368488] ata1.00: configured for UDMA/66

An issue appears the first time...

[ 6.239211] ata1.00: qc timeout (cmd 0xa0)
[ 6.243553] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
[ 6.243556] ata1.00: BMDMA stat 0x25
[ 6.243561] sr 0:0:0:0: [sr0] CDB: Inquiry: 12 01 00 00 fe 00
[ 6.243573] ata1.00: cmd a0/01:00:00:fe:00/00:00:00:00:00/a0 tag 0 dma 16640 in
[ 6.243574] res 51/50:03:00:00:00/00:00:00:00:00/a0 Emask 0x5 (timeout)
[ 6.243577] ata1.00: status: { DRDY ERR }
[ 6.243588] ata1: soft resetting link
[ 6.659718] ata1.00: configured for UDMA/66
[ 8.979746] ata1: EH complete

And it happens again...

[ 45.520036] ata1.00: qc timeout (cmd 0xa0)
[ 45.520049] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
[ 45.520318] ata1.00: BMDMA stat 0x25
[ 45.520496] sr 0:0:0:0: [sr0] CDB: Inquiry: 12 01 00 00 fe 00
[ 45.520507] ata1.00: cmd a0/01:00:00:fe:00/00:00:00:00:00/a0 tag 0 dma 16640 in
[ 45.520509] res 51/50:03:00:00:00/00:00:00:00:00/a0 Emask 0x5 (timeout)
[ 45.521049] ata1.00: status: { DRDY ERR }
[ 45.521239] ata1: soft resetting link
[ 45.684319] ata1.00: configured for UDMA/66
[ 45.684642] ata1: EH complete

* The system obviously up slower.
* Burning DVDs uses 80% CPU load instead of 95%.
* Burning speed is slower. (From 2.20x down to 1.90x; according to K3b)

...And the whole system feels notably sluggish. Maybe I'll switch to a USB DVD burner as a work-around.