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+*
+* Documentation/filesystems/udf.txt
+*
+UDF Filesystem version 0.9.8.1
+
+If you encounter problems with reading UDF discs using this driver,
+please report them to linux_udf@hpesjro.fc.hp.com, which is the
+developer's list.
+
+Write support requires a block driver which supports writing.  Currently
+dvd+rw drives and media support true random sector writes, and so a udf
+filesystem on such devices can be directly mounted read/write.  CD-RW
+media however, does not support this.  Instead the media can be formatted
+for packet mode using the utility cdrwtool, then the pktcdvd driver can
+be bound to the underlying cd device to provide the required buffering
+and read-modify-write cycles to allow the filesystem random sector writes
+while providing the hardware with only full packet writes.  While not
+required for dvd+rw media, use of the pktcdvd driver often enhances
+performance due to very poor read-modify-write support supplied internally
+by drive firmware.
+
+-------------------------------------------------------------------------------
+The following mount options are supported:
+
+	gid=		Set the default group.
+	umask=		Set the default umask.
+	mode=		Set the default file permissions.
+	dmode=		Set the default directory permissions.
+	uid=		Set the default user.
+	bs=		Set the block size.
+	unhide		Show otherwise hidden files.
+	undelete	Show deleted files in lists.
+	adinicb		Embed data in the inode (default)
+	noadinicb	Don't embed data in the inode
+	shortad		Use short ad's
+	longad		Use long ad's (default)
+	nostrict	Unset strict conformance
+	iocharset=	Set the NLS character set
+
+The uid= and gid= options need a bit more explaining.  They will accept a
+decimal numeric value which will be used as the default ID for that mount.
+They will also accept the string "ignore" and "forget".  For files on the disk
+that are owned by nobody ( -1 ), they will instead look as if they are owned
+by the default ID.  The ignore option causes the default ID to override all
+IDs on the disk, not just -1.  The forget option causes all IDs to be written
+to disk as -1, so when the media is later remounted, they will appear to be
+owned by whatever default ID it is mounted with at that time.
+
+For typical desktop use of removable media, you should set the ID to that
+of the interactively logged on user, and also specify both the forget and
+ignore options.  This way the interactive user will always see the files
+on the disk as belonging to him.
+
+The remaining are for debugging and disaster recovery:
+
+	novrs		Skip volume sequence recognition 
+
+The following expect a offset from 0.
+
+	session=	Set the CDROM session (default= last session)
+	anchor=		Override standard anchor location. (default= 256)
+	volume=		Override the VolumeDesc location. (unused)
+	partition=	Override the PartitionDesc location. (unused)
+	lastblock=	Set the last block of the filesystem/
+
+The following expect a offset from the partition root.
+
+	fileset=	Override the fileset block location. (unused)
+	rootdir=	Override the root directory location. (unused)
+			WARNING: overriding the rootdir to a non-directory may
+				yield highly unpredictable results.
+-------------------------------------------------------------------------------
+
+
+For the latest version and toolset see:
+	http://linux-udf.sourceforge.net/
+
+Documentation on UDF and ECMA 167 is available FREE from:
+	http://www.osta.org/
+	http://www.ecma-international.org/
+
+Ben Fennema <bfennema@falcon.csc.calpoly.edu>