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Date: Mon, 21 Jan 2002 12:29:54 +0100
From: Jens Axboe <axboe@suse.de>
To: Vojtech Pavlik <vojtech@suse.cz>
Cc: Andre Hedrick <andre@linuxdiskcert.org>,
        Davide Libenzi <davidel@xmailserver.org>,
        Anton Altaparmakov <aia21@cam.ac.uk>,
        Linus Torvalds <torvalds@transmeta.com>,
        lkml <linux-kernel@vger.kernel.org>
Subject: Re: Linux 2.5.3-pre1-aia1
Message-ID: <20020121122954.Z27835@suse.de>
In-Reply-To: <Pine.LNX.4.40.0201201054011.7238-100000@blue1.dev.mcafeelabs.com> <Pine.LNX.4.10.10201201555040.12376-100000@master.linux-ide.org> <20020121114311.A24604@suse.cz> <20020121114830.W27835@suse.de> <20020121121456.A24656@suse.cz>
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On Mon, Jan 21 2002, Vojtech Pavlik wrote:
> I always thought it is like this (and this is what I still believe after
> having read the sprcification):
> 
> ---
> SET_MUTIPLE 16 sectors
> ---
> READ_MULTIPLE 24 sectors
> IRQ
> PIO transfer 16 sectors
> IRQ
> PIO transfer 8 sectors
> ---
> 
> Where am I wrong?

I agree completely, see previous mail.

> By the way, the device *isn't* required to support any lower multiple
> count than the maximum one it advertizes. Ugly.

Oh? That basically narrows down the multi count value from hdparm to a
boolean on-or-off. I'd be surprised to see any drives break with lower
multi count in real life, though..

-- 
Jens Axboe

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