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NAME    [Toc]    [Back]

       dvdfs - The Digital Versatile Disk File System

STANDARDS    [Toc]    [Back]

       Interfaces  documented  on  this reference page conform to
       industry standards as follows:

       ISO/ITEC 13346:1995

              Optical Storage Technology Association (OSTA)  Universal
  Disk  Format (UDF) Specification, "OSTA UDF
              Compliant Domain", Version 2.00.

       ISO 9660:1988

              Information Processing-Volume and file structure of
              CD-ROM for information interchange.

       Refer to the standards(5) reference page for more information
 about industry standards and associated tags.

DESCRIPTION    [Toc]    [Back]

       The Digital Versatile Disk File System enables the reading
       of disks formatted in the Universal Disk Format (UDF).

       User  data  sectors  in  a DVD-ROM can contain any type of
       data in any  format.   However,  for  Tru64  UNIX  support
       through  the  dvdfs  file system, the OSTA UDF file format
       standard is mandatory.  The file system limit for DVDFS is
       int cfs_cdfs_mount_limit = 512.

       Additionally,  DVD-ROM  standards require that the logical
       sector size and the logical block (the  user  data  block)
       size be 2048 bytes.

       DVD  support  in the UDF specification includes these levels:
 DVD-ROM (Read-only):

              Supports reading of UDF-formated files from DVD-ROM
              disks.  DVD-R (Write-once):

              Supports  the  reading of UDF-formated files from a
              DVD-ROM disk and supports writing, one  time,  UDFformated
   files  onto  a  DVD-ROM  disk.   DVD-RAM

              Supports reading and writing of UDF-formated  files
              from and to a DVD-ROM disk.

       At  this  time,  the Tru64 UNIX dvdfs file system supports
       only the DVD-ROM (Read-only) format.

       See mount(8) for information about mounting and unmounting
       a  dvdfs  file  system,  fstab(4)  for  information  about
       including dvdfs file system in a system's /etc/fstab file,
       and  disklabel(8)  for  information about labeling DVD-ROM


       Commands: disklabel(8), mount(8)

       Files: cdfs(4) fstab(4) delim off

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