linux-kernel - Re: sata_sil24: external raid storage mistaken as port multiplier

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Date:	Fri, 26 Nov 2010 21:57:10 -0500
From:	Mark Lord <kernel@...savvy.com>
To:	Tejun Heo <tj@...nel.org>
CC:	Tobias Karnat <tobias.karnat@...glemail.com>,
	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: sata_sil24: external raid storage mistaken as port multiplier

On 10-11-26 03:16 PM, Tejun Heo wrote:
> Hello,
>
> On 11/26/2010 09:13 PM, Mark Lord wrote:
>>> That said, yeah, it probably would be a good idea to add a
>>> libata.force param.
>>
>> How about some form of auto-detection instead?
>
> That's a device which reports that it's a PMP but fails to behave
> itself as one.  The sucky thing is that depending on the current mode
> and firmware revision, the same hardware can actually bahave as a
> pretty decent PMP.

Yuck!  :)

I suppose *if* we knew the exact fwrev that requires the workaround,
then we could make it automatic for that, and still have the boot flag
for cases we don't know about.

Tobias?  Got the IDENTIFY info from that device?
Something like "hdparm --istdout /dev/sdX"  ?
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