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SubjectRe: New IDE code and DMA failures
On Thu, Apr 11, 2002 at 03:39:33PM -0200, Denis Vlasenko wrote:
> I have a flaky IDE subsystem in one box. Reads work fine,
> writes sometimes don't work and hang either IDE/block device
>
> Please inform me whenever you want me to test your patches.

I've been testing 2.4.17 and 2.4.19-pre6 and see some similar issues. I
have an Asus A7V w/ 1gig Athlon processor. Using the onboard Promise
UDMA100 controller, I can read and write all day long to /dev/hde all by
itself... However, after few minutes of any type of access to /dev/hdh,
/dev/hde suddenly starts having DMA errors and switches to PIO. I'm on my
third DMA66 cable (yet it fights tightly), and am still seeing the exact
same issues. I don't believe my IDE subsystem to be flaky. hde is a WD
drive, and hdh is a Maxtor.

In one of my tests the contents /dev/hdh was additionally corrupted (a
write test to /dev/hdh1) so badly that the partion information changed
from type 83 to type 3 (Xenix), and the contents of a reiser partition so
badly damaged that a --rebuild-tree and later a --rebuild-sb to reiserfsck
didn't restore it to usable. (I put those options in at the request of
reiserfsck, and I haven't wiped the drive yet if someone would like
further tests against the reiserfs partition).

--
Ted Deppner
http://www.psyber.com/~ted/
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