having problems copying a dvd

[af300wsm at gmail.com]

Hi,

I'm trying to make a copy of a dvd that I have, video, using a technique  
that I gleaned from this list nearly two years ago that has always worked  
but now I'm having problems. (When I say always, please bear in mind that I  
don't do this every day or even frequently). You'll also see calls to dd.  
These were attempts at "last ditch effort." I usually just use the copy  
command (got it from a thread entitled, "copying a dvd video," from  
November of 07). If dd will work but I just forgot to get the block size  
right, what is that supposed to be.

So, here's what I'm doing with the results. Any help is greatly appreciated  
because am at the point of pulling my hair out (which might have actually  
happened had I not shaved it off).

[root at sniper ~]# cp /dev/acd0 /usr/local/dvds/biggest_loser.iso
cp: /dev/acd0: Input/output error

[root at sniper ~]# cp /dev/acd0t01 /usr/local/dvds/biggest_loser.iso
cp: /dev/acd0t01: Input/output error

[root at sniper ~]# dd if=/dev/acd0 of=/usr/local/dvds/biggest_loser.iso
dd: /dev/acd0: Invalid argument
0+0 records in
0+0 records out
0 bytes transferred in 0.000115 secs (0 bytes/sec)

[root at sniper ~]# dd if=/dev/acd0t01 of=/usr/local/dvds/biggest_loser.iso
dd: /dev/acd0t01: Invalid argument
0+0 records in
0+0 records out
0 bytes transferred in 0.000111 secs (0 bytes/sec)


Andy