15 Jun
2007
15 Jun
'07
3:07 p.m.
At 03:07 PM 6/15/2007, Jason T wrote:
On 6/15/07, Rick Murphy <rick at rickmurphy.net>
wrote:
The low-level format of a CD is defined by a standard that everyone
follows. That means that you can use simple low-level tools to copy
A process known to work (I used this to copy the
VMS Hobbyist CD:
dd if=/dev/cdrom of=vmscd.iso bs=32768
cdrecord vmscd.iso
This thread has been educational - I had assumed that VMS and other OS
discs were essentially "uncopyable" under PC software. So will the
above process(es) also work with IRIX, NeXT, MacOSX and other format
discs (sorry I don't know the proper names of those formats?) from a CD (and copy back on to a blank CD-R). You can
do the same thing
with SCSI disks for the same reason: it's just a bunch of
bits with a
standard hardware interface; it doesn't matter what format the OS uses.
Using dd to copy from one disk to another works a treat when you're
using SCSI devices (modulo bad blocks, etc.)
For SCSI disk copying, it's best if the source and destination are the
same size. For a CD, that's taken care of.
-Rick