From: "A.Sajjad Zaidi" <sajjad@vgkk.com>
To: Petr Vandrovec <VANDROVE@vc.cvut.cz>
Cc: linux-kernel@vger.kernel.org, Alan Cox <alan@lxorguk.ukuu.org.uk>
Subject: Re: Promise, DMA and RAID5 problems running 2.4.1
Date: Thu, 08 Feb 2001 14:07:19 +0900 [thread overview]
Message-ID: <3A822987.59BBA51B@vgkk.com> (raw)
In-Reply-To: <14CC6FFB19AD@vcnet.vc.cvut.cz>
Petr Vandrovec wrote:
> It is known bug which I reported to Andre already. Open
> drivers/ide/ide.c in favorite text editor, and replace strange
> body of ide_delay_50ms() with simple mdelay(50). Promise driver
> invokes ide_delay_50ms with interrupts disabled, so it freezes
> here forever. If you have NMI watchdog, you'll get nice oopses.
>
> As for DMA failure itself, I have no idea what is wrong in your
> case, but I found that mine Promise works with Linux only iff there
> is master on each channel, slave alone does not work. And I did not
> tried master+slave together.
> Petr Vandrovec
> vandrove@vc.cvut.cz
Ok, I changed ide.c and stopped getting the freeze, but bad DMA status errors
were still showing up.
Then I connected all the drives as masters (2x ATA-100, 2x ATA-66) and havent
gotten anything yet. Buffered disk reads are still about 36.50 MB/sec on the
raid5 device, so its fast enough for what I need.
Next step is to see how well Reiserfs works here.
Thank you everyone who has helped.
A.Sajjad Zaidi
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next prev parent reply other threads:[~2001-02-08 5:07 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-02-07 13:15 Promise, DMA and RAID5 problems running 2.4.1 Petr Vandrovec
2001-02-07 19:33 ` Alan Cox
2001-02-08 5:07 ` A.Sajjad Zaidi [this message]
[not found] <Pine.LNX.4.10.10102070924340.19012-100000@coffee.psychology.mcmaster.ca>
2001-02-08 2:00 ` A.Sajjad Zaidi
2001-02-08 2:06 ` Stephen Wille Padnos
-- strict thread matches above, loose matches on Subject: below --
2001-02-07 20:40 Petr Vandrovec
2001-02-07 20:06 ` Alan Cox
2001-02-07 20:53 ` Andre Hedrick
2001-02-09 8:09 ` Vojtech Pavlik
2001-02-07 10:12 A.Sajjad Zaidi
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