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dvdfs(4)


NAME

  dvdfs - The Digital Versatile Disk File System


STANDARDS

  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

  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, UDF-formated files onto a DVD-ROM disk.

    ·  DVD-RAM (Rewritable):

       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 disks.


RELATED INFORMATION

  Commands: disklabel(8), mount(8)

  Files: cdfs(4) fstab(4)

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