[Info-vax] LDDriver, Tools to create ISO

[David J Dachtera]

JF Mezei wrote:
> 
> David J Dachtera wrote:
> 
> > The VMS equivalent is:
> >
> > $ MOUNT/FOREIGN ddcu:
> > $ COPY ddcu: DISK_IMAGE.ISO
> > $! Copy completes with an error complaining about
> > $! illegal block number, but the target file is complete
> > $! and intact.
> > $ DISM ddcu:
> 
> Wouldn't the following more accurately do a "block by block" copy:
> 
> LD CREATE myiso.iso/size=xxxxxx
> LD CONNECT myiso.iso LDA1:
> BACKUP/PHYSICAL dua0: LDA1:

I don't know as I would say "more accurately", though I expect it would
finish with a success status. "block by block" copy is "block by block"
copy - there's really nothing to screw up. Think: unit record I/O.

BACKUP/PHYSICAL output savesets are not "disk images" and apparently
cannot be used as such. On my little Alpha, I just tried an 870932 block
AOL CD of old and it produced a 972909 block saveset.

Also, both input and output devices probably need to be MOUNTed
/FOREIGN. You could automate the LD CREATE part by stat'ing the input
device to get it's size (F$GETDVI( "ddcu:", "MAXBLOCK" )), perhaps
rounding that up to the next multiple of 8, and then maybe add another 8
blocks for over-burn in case you decide to create a CD-R from it.

I don't have an Alpha with a DVD drive. So, I can't speak to that.

D.J.D.