linux-kernel - Re: libata extension

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Date:	Mon, 12 Mar 2007 10:47:28 -0400
From:	Mark Lord <lkml@....ca>
To:	Vitaliyi <imgrey@...il.com>
Cc:	linux-kernel@...r.kernel.org,
	IDE/ATA development list <linux-ide@...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.

Use the SCSI SG_IO ioctl() with opcode=ATA_16,
which gives you access to the ATA Passthrough mechanism.
This will work for most ATA commands.

I already use it in hdparm and in some other utilities
for scanning/repairing drives.

A notable exeception are the READ/WRITE LONG opcodes,
which require an extra kernel patch from me,
awaiting merge into libata some year.

Cheers

-ml
-
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