>On 7/25/05, J. Porter Clark <[EMAIL PROTECTED]> wrote:
>>
>> The ATA (definitely not SATA) controller on my Dell Latitude
>> C840 laptop has READ_DMA, WRITE_DMA problems, maybe 2-3 times
>> a day unless I turn off DMA.  It hangs for 3-4 seconds, logs
>> errors, then proceeds.  It isn't heavily loaded.  I tried using
>> Soren's ATA mkIII patches, and now it likes to panic about that
>> same frequency instead of hanging, so I'm going back to the
>> stock RELENG_5 config next chance I get.
>>
>> It's one of these:
>>
>>   atapci0: <Intel ICH3 UDMA100 controller> port 
>> 0xbfa0-0xbfaf,0x376,0x170-0x177,0x 3f6,0x1f0-0x1f7 at device 31.1 on pci0

>Your going back to stock RELENG_5 from what?

RELENG_5 with Soren's patches.

>I have that very same laptop running FreeBSD from 5.0 up to 5.4 with
>absolutely no DMA problems using it.
>Note: I did exchange the HDD from 20 to 60GB, different brands.

Might be a clue.  My laptop has this:

  ad0: 19077MB <IC25N020ATCS04 0 CA2OA72A> at ata0-master UDMA100

Typical errors:
  Jul 23 15:00:33 auricle kernel: ad0: TIMEOUT - WRITE_DMA retrying (2 retries 
left) LBA=20586350
  Jul 25 09:01:52 auricle kernel: ad0: TIMEOUT - READ_MUL retrying (2 retries 
left) LBA=1731115

I had been running 4.X on this box with no DMA problems until I
put 5.3 on it many months ago.  It also boots Windows XP, and I
don't have any obvious disk problems with that.

Do you have trouble with the touchpad occasionally going nuts?
I had mine replaced, and it still does it.  With any OS I care
to boot.

I have some Firewire-related problems, too, but I won't go into
them right now.

-- 
J. Porter Clark <[EMAIL PROTECTED]>
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