linux-kernel - Re: libATA error message doc

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Date:	Wed, 03 Oct 2007 13:54:35 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	Mike Robak <mrobak@...il.com>
CC:	linux-kernel@...r.kernel.org
Subject: Re: libATA error message doc

Mike Robak wrote:
> Does a doc exist that provides a detailed description of the different
> errors that could be produced by libata and its associated drivers?
> The libATA developer's guide provides a very good general description
> of the types of messages, but I'm looking for more detail.
> 
> For example I got this error message last week:
> 
> Sep 27 17:29:26 server kernel: ata2.00: exception Emask 0x0 SAct 0x0
> SErr 0x0 action 0x1
> Sep 27 17:29:26 server kernel: ata2.00: (irq_stat 0x40000001)
> Sep 27 17:29:26 server kernel: ata2.00: tag 0 cmd 0xb0 Emask 0x1 stat
> 0x51 err 0x4 (device error)
> 
> I'd like to know what the following items means?
> 
> (irq_stat 0x40000001)
> tag 0
> cmd 0xb0
> emask 0x1
> stat 0x51
> err 0x4

It's pretty much all defined in the ATA or controller specifications...

Well, except for emask, which is a libata-only invention.

	Jeff



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