From: Felix Domke <tmbinc@elitedvb.net>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: IDE 48 bit addressing causes data corruption
Date: Tue, 18 Mar 2003 19:20:13 +0100 [thread overview]
Message-ID: <3E77635D.5080306@elitedvb.net> (raw)
In-Reply-To: <1048004672.27223.65.camel@irongate.swansea.linux.org.uk>
Alan Cox wrote:
> LBA48 support and UDMA100/133 support are unrelated to one another.
> There are controllers with one or the other, eg the older ALi can do
> UDMA133 but not LBA48
OK, looks bad for me.
Just for my interest:
Why does a certain IDE controller not support LBA48?
I always thought an IDE controller isn't more than some ISA-styled bus
with 3 address lines, 2 chip selects and special stuff for
DMA-transfers, together with very special timing generators for PIO-modes.
Whats the problem with these controllers? LBA48, i thought, isn't more
than writing the LBA-registers twice (because of the FIFO), and using
different commands for reading/writing (the _EXT functions).
felix
next prev parent reply other threads:[~2003-03-18 18:04 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-18 14:30 Felix Domke
2003-03-18 16:24 ` Alan Cox
2003-03-18 18:20 ` Felix Domke [this message]
2003-03-18 19:37 ` Alan Cox
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