hfm(4)                         DG/UX 5.4R3.00                         hfm(4)


NAME
       hfm - high sierra file manager

DESCRIPTION
       The DG/UX kernel provides configurable support for High Sierra, ISO
       9660 and Rock Ridge (an extension to ISO 9660 that allows for unix
       style naming and attributes) formatted Compact Discs (CDs).  The high
       sierra file manager lets the system administrator mount a CD into the
       UNIX file system hierarchy.  A mounted CD will appear as a readonly
       UNIX file system.  The mode of all files from High Sierra or ISO 9660
       CDs will be readonly and executable for user, group and other.  Files
       on Rock Ridge CDs will have variable attributes, since since the
       format supports real UNIX style attributes.

       Filenames in High Sierra or ISO 9660 format are uppercase, but for
       convenience, they are translated to lowercase by the high sierra file
       manager.  All input filenames are similarly translated to uppercase.
       Rock Ridge format supports unix style names (both upper and lower
       case).  There is no translation performed on input for Rock Ridge
       CDs.  Mounted CD file systems can be NFS exported in the same way as
       any normal DG/UX file system.  The mount point must be added to
       /etc/exports and the exportfs(1M) command must be executed after the
       file system is mounted.  This will be automatic if the mount of the
       CD is in your /etc/fstab file.  Since most current CDs available in
       high sierra or ISO 9660 format are for PC's, the high sierra file
       manager will be most useful when used with a DOS emulator.

       The mount(1M) command will add the high sierra, ISO 9660 or Rock
       Ridge file system to the UNIX file system hierarchy.

            mount -t cdrom /dev/pdsk/4 /pdd/cdrom

       The special device mentioned in the mount command is the block
       special representation of the CD device in /dev/pdsk.  The type
       "cdrom" must be used with mount to route the mount request to the
       correct file manager.  The high sierra file manager will mount the CD
       as the appropriate type, as specified in the boot section of the CD.

       You may add a line to the /etc/fstab file to have the mount occur
       when the system is brought up to init level 3.

       /dev/pdsk/4    /pdd/cdrom     cdrom ro x 0

       The umount(1M) command may be used to unmount the CD from the file
       system hierarchy

            umount /pdd/cdrom

       To export the file system on the CD, in lieu of adding it to
       /etc/exports:

            exportfs -iv /pdd/cdrom

       When the mount(1M) command is issued, the CD device will lock the CD



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hfm(4)                         DG/UX 5.4R3.00                         hfm(4)


       platter into the unit until a successful umount(1M) is issued.

       The high sierra file manager does not support the path table or the
       extended attribute record from files on the CD, as these are
       unnecessary to the UNIX file system implementation.

       ISO-9660 CDs display a version number after the file name.  This can
       be removed with the noversion option to mount(1M).  See the mount(1M)
       man page for details.

SEE ALSO
       config(1M), exportfs(1M), mount(1M), umount(1M), fstab(4).













































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