CDROM(HW)                            UNIX System V



     Name
          cdrom - compact disk devices


     Description
          The cdrom devices implement the interface with compact  disk
          drives.

          The character special cd devices (/dev/rcd0, and  so  forth)
          support  raw I/O in multiples of the physical sector size of
          the CD-ROM (typically 2048 bytes).

          The block special cd devices (/dev/cd0 and so forth) support
          buffered I/O.

          The minor device number determines which compact  disk  unit
          will  be accessed. The correspondence beween the unit number
          and the SCSI host adaptor, controller and lun is defined  in
          the SCSI configuration file /etc/conf/cf.d/mscsi.


     Files
          /dev/cd[0-n]
          /dev/rcd[0-n]
          /usr/lib/mkdev/cdrom


     See Also
          scsi(HW), mkdev(ADM)


     Notes
          Because the CD-ROM is a read-only device it is only possible
          to open it for input.

          The  command  mkdev  cdrom  can  be  used  to  interactively
          configure the CD-ROM driver.


     (printed 4/27/90)                                  CDROM(HW)