linux-kernel - Re: libata extension

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Date:	Sun, 11 Mar 2007 02:04:57 -0600
From:	Robert Hancock <hancockr@...w.ca>
To:	Vitaliyi <imgrey@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: libata extension

Vitaliyi wrote:
> Good Day
> 
> Say i want to implement extended set of ATA commands available to
> userspace for building diagnostic tools.
> I need 0x40 -- read verify and 0x32 -- write long with error handling,
> for example. I was trying ide driver through ioctl's, but seems it
> lack of functionality and full of gotchas. Furthermore it oopses
> sometimes.
> 
> Is it possible to use libata for such purpose or i need to write
> separate IDE driver ?
> By the way, i'm sure it should be done in kernel space since i'm going
> to deal with some hdd manufacturer commands.
> 
> P.S. I was looking through libata and ide sources and documentation
> but still dont have broad picture.

I believe you should be able to do this by sending ATA pass-through SCSI 
commands into the device using SG_IO, without any kernel changes. It's 
really the mechanism that's meant for this..

-- 
Robert Hancock      Saskatoon, SK, Canada
To email, remove "nospam" from hancockr@...pamshaw.ca
Home Page: http://www.roberthancock.com/

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