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Date: Thu, 17 Oct 2002 12:26:14 +0200
From: Andries Brouwer <aebr@win.tue.nl>
To: James Finnie <jf1@imerge.co.uk>
Cc: "'linux-kernel@vger.kernel.org'" <linux-kernel@vger.kernel.org>,
       "'andre@linux-ide.org'" <andre@linux-ide.org>
Subject: Re: [PATCH]:  Sanity checking for drives that claim to be LBA-48, but aren't!
Message-ID: <20021017102614.GA24939@win.tue.nl>
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On Thu, Oct 17, 2002 at 10:02:00AM +0100, James Finnie wrote:

> Upon investigation of this with Seagate, it turns out that the firmware
> version in question is for CE (consumer electronics) use.  They have used
> bit 10 of word 86 (0x56) of the IDENTIFY DEVICE information to indicate some
> feature in their "AV streaming data transfer set".  This breaks ATA-7, which
> says this bit indicates that the drive understands LBA-48 commands.  
> 
> The kernel sees this bit set, tries to use LBA-48 commands, and the drive
> errors, complaining that it doesn't understand!  Meaning this drive is
> unusable with the >=2.4.19 kernels.  I think at least one other person has
> reported something very similar, IIRC with a very old Maxtor IDE drive.

Could you post the identify data for your disks? (cat /proc/ide/*/identify)

Andries
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