The N-th session of a multisession CD...

[Andrea Giuliano]

Dear all,

I'm trying to access with dd or readcd a random session on a 
multisession CD, but it turned to be frustrating and annoying.

I know, I can do a "mount -o session=N /mnt/cdrom", but it's not exactly 
the same: it seems to mount all sessions till the N-th, not just the N-th.

What I usually try to do is

	dd if=/dev/cdrom of=imageN.iso bs=2k skip=$PREV count=$COUNT

where $PREV evaluates to the starting sector for the N-th session as 
shown by "cdrecord -toc", and $COUNT is the difference between the 
starting sector for N+1-th session and the starting sector for the N-th 
session given by "cdrecord -toc".

This way I almost always get an "I/O error" from dd.

Any hint?

-- 
Andrea Giuliano, Ph. D.
ICCU - Istituto Centrale per il Catalogo Unico
Viale Castro Pretorio 105, Rome - ITALY
Tel. +39064989509, Fax +39064059302