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 _______________________________________________ Linux mailing list Linux [ at ] lists [ dot ] oclug [ dot ] on [ dot ] ca http://oclug.on.ca/mailman/listinfo/linux __________________________________________________________________ Looking for the perfect gift? Give the gift of Flickr! http://www.flickr.com/gift/