From mboxrd@z Thu Jan  1 00:00:00 1970
From: Alan <alan@lxorguk.ukuu.org.uk>
Subject: Re: Impact of no_lba48{_dma} = 1 ?
Date: Wed, 7 Feb 2007 14:19:19 +0000
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To: Steven Scholz <steven.scholz@imc-berlin.de>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>, linux-ide@vger.kernel.org

> 	hda: status timeout: status=0xd0 { Busy }
> 	ide: failed opcode was: unknown
> 	hda: no DRQ after issuing MULTWRITE_EXT
> 	ide0: unexpected interrupt, status=0x80, count=1
> 	ide0: reset: success
> 
> ) sometimes when rqsize is set to 65536 altough I only do PIO transfer?

If your hardware support for LBA48 is broken and you've not disabled
LBA48 then your hardware will do many strange things. 

If however the hwif->no_lba48 is set then drive->addressing ends up as 0
so LBA48 commands should never be issued and rqsize should never get >
256.

Alan