Messages in this thread | | | Date | Sat, 3 Jul 2010 12:37:43 -0400 | Subject | DVD-RAM problems (low priority) | From | trouble daemon <> |
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Hello again,
I am currently experiencing some problems with DVD-RAM media under ubuntu lucid lynx, and I was wondering if you might recognize some of the behaviour as being normal, or a bug.
What I do is insert a disk, then issue `mkudffs --media-type=dvdram --utf8 /dev/sr0` and then `mount /media/cdrom0`. All seems to go well and I get an entry that shows up as:
/dev/sr0 on /media/cdrom0 type udf (rw,nosuid,nodev,utf8,user=dan)
At this point, I tried a simple copy of the linux git repository (~850mb), but 3 hours later it is still copying. With other small test writes, I also noticed that when I issue a umount, the command blocks for maybe 10 seconds, then returns, yet the drive light appears to continue to be writting for at least 5 minutes past the umount. At that point it starts spiking a nice'd load or something, on one of the cores of my system to 100% and stays there until I eject the disk. The problem is that ejecting the disk seems to mess up the copy as well. And even after I eject, the load stays at 100% on one core.
As for the drive, it is:
wodim: Overview of accessible drives (1 found) : ------------------------------------------------------------------------- 0 dev='/dev/scd0' rwrw-- : 'HL-DT-ST' 'DVDRAM GH22NS50' -------------------------------------------------------------------------
Current kernel: Linux wks 2.6.32-23-generic #37-Ubuntu SMP Fri Jun 11 08:03:28 UTC 2010 x86_64 GNU/Linux
It seems that even after I umount, a program called gvfs-gdu-volume-monitor starts going nuts writting to the disc and pegging one of the cores, followed by udevd using 100% after an eject+reinsert. Correct me if I am wrong, but absolutely nothing should be writting to any device after a umount, no?
I should note that with very small tests of say 2-3mb, I can usually get a successful write, but there still is the issue of the system still writting in secret to the device after umount even then. Could this be gvfs related?
Anyways, until I can track down exactly what might be interfering with the writes, I would love to hear back on if I am just doing something incorrectly. Please CC me email address, as I do not subscribe to the LKML itself. Any help would be appreciated. Thanks!
PS - linux_udf@hpesjro.fc.hp.com as listed in the Documentation/filesystems/udf.txt file, bounces
troubled
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