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SubjectRe: HPT374 IDE problem with 2.6.21.* kernels
On Sat, 2 Jun 2007, Sergei Shtylyov wrote:

> Hello.
>
> Andrew Morton wrote:
>
>>> I saw a similar report yesterday with '2.6.21.1 - 97% wait time on IDE
>>> operations' subject.
>
>>> After upgrading from 2.6.20.7 kernel to 2.6.21.1 my system started to
>>> reset infrequenly the IDE bus. In the syslog DMA timeout, resetting IDE
>>> bus messages appeared. I've changed the two disks attached to the HPT374
>>> controller, and always the first disk had problems. I've replaced cables,
>>> plugged the disks into other IDE ports, but it was only a matter of time
>>> to experience an IDE reset. When I upgraded to 2.6.21.3 the resets became
>>> much more frequent, this time even DMA was disabled too on the first disk.
>>> I turned DMA back Manually with hdparm, and a few seconds of intense IO
>>> activity resulted in another IDE reset.
>
>>> Reverting back to 2.6.20.12 the problem seems to be gone. BTW I'm using
>>> the PATA driver for the HTP374, not the libata one.
>
>>> Is this a known problem/ is there a way I can help locating the cause of
>>> the problem?
>
> Yes, please post the boot log and the IDE reset log too for starters...
>
>> (cc's added)
>
> WBR, Sergei

Hi,

The log of a typical IDE reset is available here:

http://petra.hos.u-szeged.hu/~wildy/syslog.gz

This was the worst case: the IDE bus was resetted during the system boot.

Geller Sandor <wildy@petra.hos.u-szeged.hu>
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