cd-rom man page on IRIX

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filesystems(4)							filesystems(4)

NAME
     filesystems: cdfs, dos, fat, EFS, hfs, mac, iso9660, cd-rom, kfs, nfs,
     XFS, rockridge, lofs, udf - IRIX filesystem types

DESCRIPTION
     IRIX supports a number of different filesystems.  Some of these types are
     names that can be used with the mount(1) command's -t option.  Others are
     just common names and cannot be used with the mount command.  An example
     of this is the RockRidge type, which is a superset of the iso9660
     filesystem type.  Therefore RockRidge filesystems are mounted with a
     command similar to this:

	  mount -t iso9660 -o ro /dev/rdsk/dks0d3vol /CDROM

     The following filesystem types are supported:

     bds	 Not a file system type, an extension to NFS for bulk data
		 transfers.  The BDSpro server is an optional product and must
		 be purchased separately.

     cdfs (CD-ROM)
		 Same as type iso9660 (see below); this is the ABI compliant
		 name.

     dos (fat)	 The filesystem used by many personal computers.  Types 1, 4,
		 and 6 are supported, included long names where supported.
		 Type 5 (extended partitions) are supported only if mounted
		 with the partition # options.	IRIX support for dos
		 filesystems is restricted to removable disk devices such as
		 floppy and floptical disks.  Filenames on dos filesystems are
		 restricted to up to an eight character name followed by an
		 optional period and three character filename extension, for
		 most types.  Longer names are supported to a limited degree,
		 on the types where the native OS supports them.

     EFS	 The older extent-based disk filesystem used by IRIX for disks
		 and also for IRIX software distribution CD-ROMs.  See efs(4)
		 for more details.

     fd		 A filesystem used to access process file descriptors.

     hfs (mac)	 The filesystem used by Macintosh computers.  IRIX support for
		 hfs filesystems is restricted to removable disk devices such
		 as floppy and floptical disks and to CD-ROMs.	A hfs file is
		 composed of three portions:  a data fork, a resource fork,
		 and a desktop information entry.  The data fork appears in a
		 normal directory.  The resource fork in a special directory
		 (.HSResource) in the file's directory.	 The desktop
		 information for all files in a directory is contained in the
		 special file .HSancillary.

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filesystems(4)							filesystems(4)

     iso9660 (CD-ROM)
		 A CD-ROM filesystem type conforming to ISO standard 9660.
		 iso9660 CD-ROMs are used when the contents of the CD-ROM is
		 intended to be readable by a variety of operating systems.
		 You must install the optional subsystem eoe.sw.cdrom to be
		 able to mount and read an iso9660 CD-ROM.  Also see RockRidge
		 below.	 Note that IRIX software distribution CD-ROMs are not
		 iso9660 filesystems, they are efs filesystems.	 Music CDs are
		 not file structured and are not used as filesystems.  Music
		 CDs can be played using the CD-ROM drive using cdman(1) or
		 cdplayer(1).

     kfs	 A network filesystem used to access disks on located on
		 remote computers using AppleShare networking.	Generally,
		 AppleShare networking is used to access Macintosh computers.
		 Except for the disk location, kfs filesystems are identical
		 to hfs filesystems.

     nfs	 A network filesystem used to access disks located on remote
		 computers.  Both NFS Version 2, and NFS Version 3 are
		 supported.  In Irix 6.5.24 and beyond, direct I/O is
		 available for NFS Version 3.  The subsystem nfs.sw.nfs must
		 be installed to use NFS.

     proc	 A filesystem that provides access to the image of each active
		 process in the system.

     hwgfs	 A filesystem that provides access to the system hardware
		 configuration.

     RockRidge	 A filesystem layered on type of the iso9660 filesystem type
		 (see above) that provides semantics closer to those of
		 standard UNIX filesystems.  In particular, it supplies file
		 permissions and allows for directory hierarchies more than 8
		 levels deep.

     XFS	 The next-generation 64-bit high performance journaling
		 filesystem used by IRIX for disks.  See xfs(4) for more
		 details.

     cachefs	 A caching filesystem for use with efs, xfs, nfs, nfs3,
		 iso9660, hfs, dos, kfs, and cdfs.  See cachefs(4) for
		 details.

     lofs	 The loopback filesystem allows new virtual filesystems to be
		 created to provide access to existing files using alternative
		 pathnames. The most common use of lofs is by autofs to mount
		 filesystems, exported by the local host.

		 lofs filesystem cannot be mounted using mount(1M) command.

									Page 2

filesystems(4)							filesystems(4)

		 After the virtual filesystem is mounted, other filesystems
		 can be mounted within it, covering, but not  affecting, parts
		 of the original filesystem. However, filesystems which are
		 subsequently mounted onto the original underlying file system
		 are visible to the virtual file system, except that recursive
		 traversals are not allowed, i.e if / is mounted on /newroot,
		 access to /newroot/newroot would not lead to another
		 filesystems, rather it will appear as a normal directory,
		 just as it was on the original underlying filesystem before
		 the mount.

     UDF	 A filesystem type typically used for DVDs. The subsystem
		 eoe.sw.udf must be installed to use UDF.

NOTE
     The nfs and kfs filesystems are optional products.	 Support for iso9660
     filesystems is in the optional subsystem eoe.sw.cdrom.

     IRIX implements dos, hfs, iso9660, and kfs filesystems as user mode NFS
     daemons.  In some cases errors detected by these daemons are reported as
     NFS errors.  Although NFS is a product option, support for these
     filesystem types is not dependent on the installation of NFS.

     Prior to IRIX 6.5.28 the iso9660 filesystem was based on NFS Version 2
     and was limited to a maximum accessible filesystem size and file size of
     2 GiB.  Starting from IRIX 6.5.28 iso9660 can support NFS version 3
     protocol which could be used to access larger filesystems and files.
     Users of IRIX 6.5.27 and earlier releases can use freeware tools such as
     isoinfo(8) from fw_cdrtools to extract files which are past the 2GiB
     boundary.

SEE ALSO
     exportfs(1M), fpck(1M), fsck(1M), mediad(1M), mkfp(1M), mkfs(1M),
     mount(1M), mount_kfs(1M), efs(4), fd(4), fstab(4), hwgfs(4), proc(4),
     xfs(4).

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