Hi (again):
> the problem is that for me my physical volume in my vg00 volume group must be a SCSI disk not a CDROM, and when I try to use vgextend on vg00 I get [an] error:
Post the exact command and command arguments you used, please. Guessing what your configuration looks like and/or guessing what arguments to commands you have supplied gets us no where fast.
Regards!
...JRF...