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filesystems(4)							filesystems(4)

NAME    [Toc]    [Back]

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

DESCRIPTION    [Toc]    [Back]

     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

     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.

									Page 1

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

     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.  NFS is an optional	product	and must be purchased
		 separately.  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

     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

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

NOTE    [Toc]    [Back]

     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.

									Page 2

filesystems(4)							filesystems(4)

SEE ALSO    [Toc]    [Back]

     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),

									PPPPaaaaggggeeee 3333
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