From: Tejun Heo <htejun@gmail.com>
To: Mark Lord <liml@rtr.ca>
Cc: Johny Mail list <maillist.johny@gmail.com>,
Brad Campbell <brad@wasp.net.au>,
linux-raid@vger.kernel.org, linux-ide@vger.kernel.org
Subject: Re: Linux Software RAID is really RAID?
Date: Wed, 04 Jul 2007 10:20:56 +0900 [thread overview]
Message-ID: <468AF5F8.9060703@gmail.com> (raw)
In-Reply-To: <468AD708.2010806@rtr.ca>
Mark Lord wrote:
> I believe he said it was ICH5 (different post/thread).
>
> My observation on ICH5 is that if one unplugs a drive,
> then the chipset/cpu locks up hard when toggling SRST
> in the EH code.
>
> Specifically, it locks up at the instruction
> which restores SRST back to the non-asserted state,
> which likely corresponds to the chipset finally actually
> sending a FIS to the drive.
>
> A hard(ware) lockup, not software.
> That's why Intel says ICH5 doesn't do hotplug.
OIC. I don't think there's much left to do from the driver side then.
Or is there any workaround?
--
tejun
next prev parent reply other threads:[~2007-07-04 1:21 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-26 17:43 Linux Software RAID is really RAID? Johny Mail list
2007-06-26 18:34 ` Brad Campbell
2007-06-27 11:54 ` Johny Mail list
2007-07-03 8:15 ` Tejun Heo
2007-07-03 12:17 ` Johny Mail list
2007-07-03 23:08 ` Mark Lord
2007-07-04 1:20 ` Tejun Heo [this message]
2007-07-04 9:14 ` Alan Cox
2007-07-04 18:56 ` Mark Lord
2007-07-12 16:27 ` Johny Mail list
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