linux-kernel - Re: [BUG] ide dma_timer

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Date:	Tue, 19 Jun 2007 11:48:54 -0500
From:	linas@...tin.ibm.com (Linas Vepstas)
To:	Sergei Shtylyov <sshtylyov@...mvista.com>
Cc:	Stuart_Hayes@...l.com, linux-ide@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [BUG] ide dma_timer_expiry, then hard lockup

On Tue, Jun 19, 2007 at 08:10:25PM +0400, Sergei Shtylyov wrote:
> 
> >I'm thinking that trying to debug libata is a better idea, rather than
> >investing time in ide, right?  Although at the moment, libata works even 
> >less; see other email.
> 
>    Which makes me think this really is some *hardware* issue.

There are two distinct issues.
-- libata locks up in partition table read on an hpt366+old maxtor disk
   that has ben working fine for many years with old ide driver. (It
   still works fine when I boot to the alternate ide-based kernel).

-- ide driver locks up on hpt366+new maxtor disk under heavy 
   i/o load. I was able to copy 60GB from old to new disk without a
   problem; however, raid reconstruction locks it up, maybe after 5-15
   seconds.

   This probably is "hardware related"; its something that the new 
   hard drive does. Given that its being sold at a big discount, it
   may even be that the sellers know that this is a crappy disk. :-)

   All I want is some way of resetting the disk, and continuing on.

I'm stalled in debugging; I'm not sue what I'm looking for.

--linas


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