Mine is IDE. k3b actually worked, but seems slower than it did before
this msg started popping up. Brasero doesn't complain - but I didn't try
a burn. However, I'd like to know why the hdparm -d 1 ... fails. Sigh.
JN
Robert Echlin wrote:
I also have jaunty jackalope.
According to /etc/fstab, this is my DVDROM, which gives me a target for
your hdparm command:
----------------
rme@daddy:~$ grep cdrom /etc/fstab
/dev/scd0 /media/cdrom0 udf,iso9660 user,noauto,exec,utf8 0 0
rme@daddy:~$ hdparm -d /dev/scd0
/dev/scd0:
HDIO_GET_DMA failed: Inappropriate ioctl for device
-------------------
My DVD isn't a writer, just a reader.
Also, it isn't SATA, just old-school IDE - is your's SATA?
So, yours seems to need dma and mine doesn't.
However, SATA DVD's are newish to Linux and support was spotty a year
or so ago. My desktop machine at work that has a SATA DVD-writer takes
an extra minute ( or two?) to boot up because the Linux OS I was running
waits for it to respond to some HD-only query that the DVD-writer is
ignoring.
-> Not sure if it still does this, so I won't name the OS.
Rob
--
Rob Echlin, B. Eng.
Automation Delivers!
http://talksoftware.echlin.ca
Ottawa, ON
Mobile: 613-266-8311
------------------------------------------------------------------------
*From:* Prof. John C Nash <nashjc [ at ] uottawa [ dot ] ca>
*To:* linux [ at ] lists [ dot ] oclug [ dot ] on [ dot ] ca
*Sent:* Sat, October 17, 2009 6:09:19 PM
*Subject:* [OCLUG-Tech] dma in Ubuntu?
Recently k3b has been complaining on startup:
DMA disabled on device HL-DT-ST - DVDRAM GSA-4167B
I'm running Ubunutu Hardy (Jaunty seems to be set up very differently,
with different /dev/... for the DVDRW)
When I try
hdparm -d /dev/hda
I get
/dev/hda:
using_dma = 0 (off)
Putting in
/dev/hda:
setting using_dma to 1 (on)
HDIO_SET_DMA failed: Operation not permitted
using_dma = 0 (off)
I've looked on the web, and there is some commentary about enabling dma
in the kernel. Yikes -- we shouldn't need regular users to do that.
Any ideas? Or is this a false complaint by k3b.
JN
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