lkml.org 
[lkml]   [2003]   [Jul]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: DVD-RAM crashing system
Date
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

fredag 18. juli 2003, 22:06, skrev Nachman Yaakov Ziskind:
> Anyone out there with tips on how to resolve this? Perhaps I can
> force the kernel to think that DMA has been disabled?

No tips, I'm afraid, but don't even *think* about doing that.
As the technician said, the problem is with the chipset not accepting commands
properly; fortunately, the kernel appears to catch the situation and avoid
(potential) severe damage.

Forcing the kernel to act as if DMA is fully disabled when in fact it isn't
sounds like a very bad idea indeed; the best you could probably hope for is
to have the machine crash without losing any data.


My suggestion is this: As the hardware is obviously broken, and disabling DMA
would cause a horrendous performance drop anyway, you should get a new
chipset. Return the one you have as broken.

If that isn't an option, for whatever reason, you might try switching to a
lower-speed DMA mode using hdparm. Something like "hdparm -Xudma0 /dev/hdx"
might help, if you're lucky.

- - Svein Ove Aas
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.2 (GNU/Linux)

iD8DBQE/GG/f9OlFkai3rMARApCiAKCojeoY+nfskcM6EKFco8xktnSfjQCfTq6u
rkZjj7+DtP90zv8cHuTorrA=
=lr9Y
-----END PGP SIGNATURE-----

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:46    [W:0.304 / U:0.740 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site