VIO 가상 아답터 생성

 On VIO Server create optical device:

    -for using physical CDs and DVDs, create an optical device
        $ mkvdev -vdev cd0 -vadapter vhost4 -dev vcd
        vcd Available
    
        $ lsdev -virtual
        ...
        vcd             Available  Virtual Target Device - Optical Media

    -for file backed (iso images) optical device
        $ mkvdev -fbo -vadapter vhost1
        vtopt0 Available

        $lsdev -virtual
        ...
        vtopt0           Available   Virtual Target Device - File-backed Optical

        (copy the iso image to /var/vio/VMLibrary, 'lsrep' will show media repository content)
        (lssp -> mkrep -sp rootvg -size 4G    <--this will create media repository)
        (creating an iso image: mkvopt -name <filename>.iso -dev cd0 -ro)

        load the image into the vtopt0 device: loadopt -vtd vtopt0 -disk dvd.1022A4_OBETA_710.iso
        (lsmap -all will show it)
        
        or you can check it:
        padmin@vios1 : /home/padmin # lsvopt
        VTD             Media                                   Size(mb)
        vtopt0          AIX_7100-00-01_DVD_1_of_2_102010.iso        3206
            
        if later another disk is needed, you can unload an image with this command: unloadopt -vtd vtopt0
        if we don't need the image anymore at all we can remove it from the repository: rmvopt -name AIX_7100-00-01.iso