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Date: Wed, 11 May 2005 15:26:02 +0200
From: =?ISO-8859-1?Q?S=F8ren_Schmidt?= <sos@DeepCore.dk>
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To: Ruslan Ermilov <ru@FreeBSD.org>
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Subject: Re: Accessing IDE disk with bad sectors freezes the box
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Ruslan Ermilov wrote:
> Hi Soren,
>=20
> I have a disk with lot of bad sectors.  When working with it on
> an AMD64 box running 6-CURRENT, accessing bad areas just freezes
> the box completely, without any diagnostics.  The same disk when
> plugged into another i386 box running 4-STABLE works properly by
> issuing errors from the kernel, and reporting EIO to userland.
>=20
> Is there something I can do to try to mitigate this issue?

Hmm, depending on the problem the disk has and how the controller is=20
implemented the behavior on fatal errors can be unpredictable,=20
especially when DMA is involved (some controllers just lock the bus=20
completely so our timeout code wont get a chance).
If you switch the disk to PIO mode, does that help any ?


--=20

-S=F8ren