From: Douglas Gilbert <dgilbert@interlog.com>
To: linux-kernel <linux-kernel@vger.kernel.org>, agusmdp@hotmail.com
Subject: Re: Problems with scsi emulation
Date: Mon, 02 Jun 2003 14:55:06 +1000 [thread overview]
Message-ID: <3EDAD8AA.50503@interlog.com> (raw)
> I'm using a customized 2.4.20 kernel (red hat 9) with
> scsi emulation, scsi cdrom & scsi generic support
> options enabled in .config and hdx-ide-scsi in
> lilo.conf. apps as cdrecord or cdrdao take up all my
> cpu time (I have a duron 1.1 gz, kt133, 192mb sdram,
> 30 gb 5400 rpm hd). in windows (with dma enabled) Nero d
> oesn't take up any (or almost) cpu time...
> is this an issue of the linux-kernel or a configuration
> problem?
Due to many problems with DMA locking up on ATAPI writers
earlier in the lk 2.4 series, Linux takes a very
conservative approach and turns off DMA.
It can be turned back on with:
# hdparm -d 1 /dev/hdb
assuming your cdwriter is found at /dev/hdb (even
though the ide-scsi driver "owns" that device
and you address it as /dev/scd0 ). You can get
faster DMA modes with the addition of the "-X"
switch in hdparm but that should not be necessary.
Doug Gilbert
next reply other threads:[~2003-06-02 4:42 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-06-02 4:55 Douglas Gilbert [this message]
1970-01-13 6:22 ` Problems with scsi emulation Agustín Herrera
-- strict thread matches above, loose matches on Subject: below --
2003-06-06 4:18 Jonathan Woithe
2003-06-01 18:28 Agustín Herrera
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=3EDAD8AA.50503@interlog.com \
--to=dgilbert@interlog.com \
--cc=agusmdp@hotmail.com \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.