linux-kernel - Re: Limit SATA link speed to 1.5 Gbps

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Message-ID: <20080522122905.49cca18d@core>
Date:	Thu, 22 May 2008 12:29:05 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	"Andre Pietsch" <andre.pietsch@...i.de>
Cc:	<linux-kernel@...r.kernel.org>
Subject: Re: Limit SATA link speed to 1.5 Gbps

> I tested 2.6.25 and the error still occurrs once but then it gave me a "limiting SATA link speed to 1.5 Gbps" in the log.

The later kernels will drop the SATA speed on repeated errors if they see
what appears to be a consistent problem that might be cabling/noise.

> Is it possible to set the SATA link speed somewhere?

Not sure. I've not looked whether that is in the new "force" code. I
don't think you can in 2.6.24 however, and 2.6.25 will fall back nicely.

Other than being annoying during the install it should not cause any
other problems beyond all the retries.

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