USB dvdrw mount point Woes
Object: Use Sony DRX-510DRl usb dvdrw with cdparanoia and cdrecord to
rip cd tracks and write data and audio cd's. Box is Testing with kernel
compiled from Debian kernel-source-2.6.8.
Initially less /proc/bus/usb/devices showed device details but
cdparanoia and cdrecord cannot find it and there is no mount point to
read a data cd.
16 May there was a posting on the list that indicated discovery was the
problem and suggested discovery1. Switched to discovery1 and had read
data access to the device as /dev/sr0 but system crashed on shutdown.
(At this point I was also recompiling the kernel trying to enable
realtime. That problem solved by rmmod capability followed by modprobe
realtime gid=29.)
.
Purged discovery, discovery1. System shuts down ok, hotplug disconnect
and hotplug connect of Sony drive ok and read data access to device as
/dev/sr0 ok but cdparanoia and cdrecord cannot find Sony dvdrw..
Recompiled kernel with modules for
SCSI device support,
SCSI disk support,
SCSI CDROM support, and
SCSI generic support
Now /dev/sr0 is gone, /dev/sg0 is present. cdrecord -scanbus sees the
device at 0,0,0 and cdparanoia -v -d /dev/sg0 17 track17.wav with rip
the track but it is no longer possible to mount the device to read a
data cd and shutdown will crash the system as will unplugging and
replugging the usb cable. (Note: This problem is specific to the
device. At all times I have been able to plug and unplug a jumpdrive
with no problems whatsoever.)
Since I have installed the SCSI support as modules, perhaps I only need
to remove and install certain modules and all would be well. I am
reluctant to experiment as it is a real pain recovering from improperly
shut down file systems.
Any guidance to managing the problem would be most welcome.
Tom George
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