Public SourceMage Discussion List

[Eric Sandall <eric AT sandall.us>]

Quoting Paul <dufflebunk AT dufflebunk.homeip.net>:
> I updated cdrecord and I've started to have problems. It complains now:
> cdrecord: DMA speed too slow. Cannot cdrecord: DMA speed too slow. Cannot
> write at speed 24.
> 
> So it requires me to run it with driveropts=burnfree. I did not require
> this for the last version. It prevents nautilus and cdrtoaster from
> working because it needs the extra argument. I'm downgrading now, I
> don't care to actualy run it in non-dummy mode with burnfree on. It was
> burning perfectly three days ago.

The latest version (a33) does DMA checking to make sure it runs at what it
thinks is a safe speed, IIRC.

You could try some of the following (from `man cdrecord`):
       CDR_FORCESPEED
              If  this environment variable is set, cdrecord will allow you to
              write at the full DMA speed the system supports.   There  is  no
              DMA  reserve  for  reading  the  data that is to be written from
              disk.  This will create high potential of buffer underruns.  Use
              with care.


       /etc/default/cdrecord
              Default  values  can  be  set  for  the  following  options   in
              /etc/default/cdrecord.     For   example:   CDR_FIFOSIZE=8m   or
              CDR_SPEED=2

              CDR_DEVICE
                     This may either hold a device identifier that is suitable
                     to the open call of the SCSI transport library or a label
                     in the file /etc/default/cdrecord that allows to identify
                     a specific drive on the system.

              CDR_SPEED
                     Sets the default speed value for writing (see also -speed
                     option).

              CDR_FIFOSIZE
                     Sets the default size of the FIFO (see also fs=# option).


       -force Force to continue on some errors. Be  careful  when  using  this
              option.   Cdrecord  implements  several  checks that prevent you
              from doing unwanted things like damaging CD-RW media by improper
              drives.  Many  of the sanity checks are disabled when the -force
              option is used.

              This option also implements some tricks that will allow  you  to
              blank bad CD-RW disks.

This may help.

-sandalle

-- 
Eric Sandall                     |  Source Mage GNU/Linux Developer
eric AT sandall.us PGP: 0xA8EFDD61  |  http://www.sourcemage.org/
http://eric.sandall.us/          |  SysAdmin @ Inst. Shock Physics @ WSU
http://counter.li.org/  #196285  |  http://www.shock.wsu.edu/

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