On Wed, 20 Jul 2005, Steve wrote:
I've found tons of emails, news messages, listserv messages, and even
some bug reports of this seemingly common error.
So, I had been running 5.2 on a server, and, updated to 5.3. Got the
READ_DMA and WRITE_DMA error and retries. So, figuring it might be a bad
update, took a new drive. put it in, loaded 5.4 for grins, and, same
issue, lots of these errors, eventually destroying the FS. Played around
with various settings, no avail. So, took it back, got different box,
everything new. Same problem, new install of 5.4
6.0 contains a significant re-write and update of the ATA driver, and
corrects a number of known problems with timeouts and reliability. This
rewrite is available as patches against 5.x, but has not been committed
because ATA is a very sensitive thing (lots of very diverse and very
broken hardware), and has had insufficient testing. If you have test
hardware available that's not in production, it would be quite helpful if
you could install 6.0-BETA2, once that comes out in the next week or so,
and see if the specific ATA problems you're experiencing occur there.
It's not impossible that the new ATA code will be merged to 5.x, but I
think we cannot do that until it has seen a lot more exposure. If you
search back through the mailing archives, you should be able to find posts
from Soren regarding the new ATA patches, if you want to give them a try
on 5.x.
Robert N M Watson
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