From: Peter Osterlund <petero2@telia.com>
To: linuxer@ever.mine.nu
Cc: linux-kernel@vger.kernel.org
Subject: Re: pktcdvd DVD+RW always writes at max drive speed (not media speed)
Date: 18 Feb 2006 23:19:04 +0100 [thread overview]
Message-ID: <m3r760cntz.fsf@telia.com> (raw)
In-Reply-To: <200602182023.k1IKNNuI012372@rhodes.mine.nu>
linuxer@ever.mine.nu writes:
> In drivers/block/pktcdvd.c it appears that in the case of DVD
> rewriting, pkt_open_write always sets the write speed to pkt_get_max_speed
> (the maximum writing speed reported by the drive).
>
> In my case, I have a new drive capable of 8x re-writing. However, all of
> my existing media is rated for only 4x rewrite speed.
>
> When attempting to rw mount these disks, pktcdvd reports:
>
> Feb 18 00:09:52 ever kernel: pktcdvd: write speed 11080kB/s
> Feb 18 00:09:54 ever kernel: pktcdvd: 54 01 00 00 00 00 00 00 00 00 00 00 -
> sense 00.54.9c (No sense)
> Feb 18 00:09:54 ever kernel: pktcdvd: pktcdvd0 Optimum Power Calibration failed
>
> And then of course a huge heap of I/O errors on the disk.
Have you verified that this is caused by the speed setting, ie does it
work correctly if you hack the driver to write at 4x speed?
--
Peter Osterlund - petero2@telia.com
http://web.telia.com/~u89404340
next prev parent reply other threads:[~2006-02-18 22:19 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-02-18 20:23 pktcdvd DVD+RW always writes at max drive speed (not media speed) linuxer
2006-02-18 22:19 ` Peter Osterlund [this message]
2006-02-18 23:35 ` linuxer
2006-02-19 10:09 ` Peter Osterlund
2006-02-22 22:28 ` Peter Osterlund
2006-02-25 1:12 ` linuxer
2006-02-25 22:43 ` Peter Osterlund
2006-02-19 6:11 ` Phillip Susi
2006-02-19 6:46 ` linuxer
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=m3r760cntz.fsf@telia.com \
--to=petero2@telia.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linuxer@ever.mine.nu \
/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.