Date: Fri, 11 Jul 2008 21:14:09 +0100
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Ondrej Zary <linux@rainbow-software.org>
Cc: Alan Cox <alan@redhat.com>, LKML <linux-kernel@vger.kernel.org>,
       linux-ide@vger.kernel.org
Subject: Re: pata_it821x completely broken
Message-ID: <20080711211409.2eef4ddb@lxorguk.ukuu.org.uk>
In-Reply-To: <200807112043.36772.linux@rainbow-software.org>
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	<200807102235.22651.linux@rainbow-software.org>
	<200807112043.36772.linux@rainbow-software.org>
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> > commenting out the error check after ata_dev_init_params() call in
> > ata_dev_read_id() function (libata-core.c), I got at least the device name.
> > The capacity is 0 so it doesn't work, obviously:

If you don't read the ID then it wouldn't.

> I captured the IDENTIFY data from the virtual device. I'm not ATA guru but
> looking at the data, there are zeros at many places where something should be.
> That number starting at 0x78 looks like size of the array in sectors
> (0x4C726C or 0x4C6C72 - the array is built from 2.5GB and 6.4GB drives).

The Ident data for the virtual device is fairly sparse but the specs
don't require a lot of the field are filled in and only the LBA really
matters.

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