From: Ondrej Zary <linux@rainbow-software.org>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: jgarzik@pobox.com, linux-ide@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: sata_via: write errors on PATA drive connected to VT6421
Date: Tue, 21 Aug 2007 19:09:30 +0200 [thread overview]
Message-ID: <200708211909.30652.linux@rainbow-software.org> (raw)
In-Reply-To: <20070821132731.6bf10b50@the-village.bc.nu>
On Tuesday 21 August 2007 14:27:31 Alan Cox wrote:
> > The transfer mode decreases from UDMA/100 to UDMA/66 and then UDMA/33 but
> > it doesn't help at all. The drive itself is fine, the problems also
> > appear with
>
> Does it settle at UDMA33 or keep going down lower ?
It does not go below UDMA33.
dd if=/dev/zero of=some.file bs=131072 count=1024 takes 526 seconds (amazing
transfer rate 255KB/s) with system being unresponsive most of the time.
Commenting out the UDMA support in sata_via.c (.udma_mask and .set_dmamode for
PATA port) causes the driver to run in PIO4 mode which seems to work without
errors but slowly (3MB/s with 100% CPU load).
--
Ondrej Zary
next prev parent reply other threads:[~2007-08-21 17:09 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-20 20:42 sata_via: write errors on PATA drive connected to VT6421 Ondrej Zary
2007-08-21 12:27 ` Alan Cox
2007-08-21 17:09 ` Ondrej Zary [this message]
2007-08-31 22:55 ` Ondrej Zary
2007-08-31 23:19 ` Alan Cox
2007-09-01 10:52 ` Jeff Garzik
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