From: Andre Hedrick <andre@linux-ide.org>
To: Kurt Garloff <kurt@garloff.de>
Cc: --Damacus Porteng-- <kernel@bastion.yi.org>,
Linux kernel list <linux-kernel@vger.kernel.org>
Subject: Re: IDE-SCSI/HPT366 Problem
Date: Wed, 29 Nov 2000 10:27:17 -0800 (PST) [thread overview]
Message-ID: <Pine.LNX.4.10.10011291025411.1743-100000@master.linux-ide.org> (raw)
In-Reply-To: <20001129191402.F5891@garloff.etpnet.phys.tue.nl>
On Wed, 29 Nov 2000, Kurt Garloff wrote:
> Strange. If you read data from the harddisk on an IDE channel and write it
> (with cdrecord) to some CDRW on the same IDE channel, you have to expect
> trouble: As with IDE there is no disconnect from the bus (as opposed to
> SCSI), you risk buffer underruns.
> A lockup however is not to be expected :-(
It is completely expected bacause of teh active timing changes done on
this chipset design. The timings are for ATA DMA and not ATAPI.
You should expect a 100% hardlock on mistimed IO access.
Cheers,
Andre Hedrick
CTO Timpanogas Research Group
EVP Linux Development, TRG
Linux ATA Development
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next prev parent reply other threads:[~2000-11-29 18:58 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-11-29 19:06 --Damacus Porteng--
2000-11-29 18:14 ` Kurt Garloff
2000-11-29 18:20 ` James A Sutherland
2000-11-29 18:27 ` Andre Hedrick [this message]
2000-11-30 4:52 ` Damacus Porteng
2000-11-30 6:25 ` Andre Hedrick
2000-11-30 12:12 ` Kurt Garloff
2000-11-30 1:08 ` Mike A. Harris
2000-11-29 18:23 ` Andre Hedrick
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