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* [gentoo-user] dd if=/dev/dvd of=backup.iso - DMA related problem
@ 2006-03-23 16:40 Joseph
  2006-03-23 19:18 ` [gentoo-user] " Sven Köhler
  2006-03-24  3:44 ` [gentoo-user] " Richard Fish
  0 siblings, 2 replies; 17+ messages in thread
From: Joseph @ 2006-03-23 16:40 UTC (permalink / raw
  To: gentoo

A week ago I was posted a message when struggling trying to copy my
own DVD with:
dd if=/dev/dvd of=backup.iso  or
cat /dev/dvd >backup.iso

After following several leads from Gentoo folks (including replacing DVD
cable) I've narrow it down to problem with "dma" resetting itself on
"eject". 

When I boot the computer (amd64) the DVD DMA is "ON" 
[quote]using_dma = 1 (on) 

At this point I can make as many copies as I want using commands "dd" or
"cat" but I can not issue eject command 
eject /dev/hdc

As soon as I eject the CD (and reinsert it) the status of DMA is
changing on the DVD 
using_dma = 0 (off) 
And at this point make no difference if I change that status back to
"ON" or not every subsequent DVD copy fails.

I've run onto few posting on Google regarding DMA resetting itself but
no solution.
-- 
#Joseph
-- 
gentoo-user@gentoo.org mailing list



^ permalink raw reply	[flat|nested] 17+ messages in thread

end of thread, other threads:[~2006-03-24 21:04 UTC | newest]

Thread overview: 17+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2006-03-23 16:40 [gentoo-user] dd if=/dev/dvd of=backup.iso - DMA related problem Joseph
2006-03-23 19:18 ` [gentoo-user] " Sven Köhler
2006-03-23 19:54   ` Joseph
2006-03-23 21:15     ` JimD
2006-03-23 21:26       ` Joseph
2006-03-23 21:32         ` Joseph
2006-03-23 22:25         ` JimD
2006-03-23 22:55           ` Joseph
2006-03-23 21:38     ` Nick Rout
2006-03-24  3:44 ` [gentoo-user] " Richard Fish
2006-03-24  4:11   ` Joseph
2006-03-24  4:24     ` Richard Fish
2006-03-24  5:34       ` Joseph
2006-03-24  5:51         ` Richard Fish
2006-03-24 15:49           ` Joseph
2006-03-24 18:08             ` JimD
2006-03-24 20:45               ` Joseph

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