Re: Packet writing issue on 2.6.15.1

[Paul <set@pobox.com>]

Phillip Susi <psusi@cfl.rr.com>, on Sat Feb 11, 2006 [08:10:56 PM] said:
> cdrecord is just burning the image in dao/tao/sao mode.  To use pktcdvd 
> to read/write the disc on the fly it must be formatted for packet mode 
> using cdrwtool.  If the disc is formatted in MRW mode, then you don't 
> even need pktcdvd to read/write it, that is supported by the firmware in 
> the drive.  Right now I believe you can use the dvd-rwtools package to 
> format media in MRW mode, and I plan on adding it as an option to 
> cdrwtool at some point.  See http://fy.chalmers.se/~appro/linux/DVD+RW/ 
> for more info.

	Hi;

	This is not technically true; once the pktcdvd mapping is made,
the device can be accessed like a r/w block device. For example, after
I associate the dvd with the pktcdvd device, I then can associate it
with a cryptographic loop device, and mke2fs on that, then mount it
and use it like any other filesystem. Something like:

pktsetup dvd /dev/dvd
losetup -e serpent-256 /dev/loop0 /dev/pktcdvd/dvd
mke2fs -m0 /dev/loop0
mount -o noatime,rw /dev/loop0 /mntpoint

	I realize you are differentiating between burning an iso
type image from what cdrwtool does, but I thought I would mention
my usage;) Obviously this would not be compatible with anything
else, which is intentional.
	What is the difference between using cdrwtool on the cd/vd-rw
to form an initial image, and just doing a mkudffs on a pktcdvd
associated device?

Paul
set@pobox.com