PATCH: DMA enabled dump for ATA please test

Søren Schmidt sos at
Thu Jan 12 13:37:48 PST 2006

Christian Brueffer wrote:
> On Thu, Jan 12, 2006 at 09:18:56PM +0100, Søren Schmidt wrote:
>>Christian Brueffer wrote:
>>>I have tested this on my Thinkpad T41p with the following hardware:
>>>atapci0: <Intel ICH4 UDMA100 controller> port 
>>>0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0x1860-0x186f at device 31.1 on pci0
>>>ata0: <ATA channel 0> on atapci0
>>>ata1: <ATA channel 1> on atapci0
>>>ad0: 57231MB <HTS726060M9AT00 MH4OA6DA> at ata0-master UDMA100
>>>acd0: CDRW <UJDA755yDVD/CDRW/1.72> at ata1-master UDMA33
>>>With the patched kernel it stops after printing the acd0 line and spews
>>>out the following:
>>>acd0: req=0xc350f8d0 TEST_UNIT_READY semaphore timeout  !!  DANGER Will 
>>>Robinson  !!
>>>Do you need boot -v output? (I'll have to hook up a serial or firewire
>>>console, that's why I haven't provided it already).
>>Would be nice actually, the stinkpads might need special treatment yet 
>>again, oh well, I'll dig out my R30 and get it updated as well to test...
>>Are you sure it worked with a new stock current kernel before the patch 
>>went in ? I've seen a few of these errors lately but that was before ATA 
>>was even touched, so something else might have changed as well....
> Positive, built the patched kernel from the same sources as the working
> kernel I'm currently using.
> Verbose bootlog:

Hmm, does it help if you turn off DMA to the CD/DVD device ?
My R30 seems to work fine, but its CDROM drive doesn't do DMA...


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