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mount_udf(8)              BSD System Manager's Manual             mount_udf(8)


NAME

     mount_udf -- mount a UDF filesystem


SYNOPSIS

     mount_udf [-o options] [-s sessionStart] [-n lastRecordedLBA]
               [-b blockSize] [-p packetSizeInBlocks] [-v verificationPolicy]
               [-w] devicePath mountPath


DESCRIPTION

     The mount_udf command attaches the UDF filesystem residing on the device
     devicePath to the global filesystem namespace at the location indicated
     by mountPath.  This command is normally executed by mount(8) at boot
     time.

     The options are as follows:

     -o options
             Options are specified with a -o flag followed by a comma sepa-
             rated string of options.  See the mount(8) man page for possible
             options and their meanings.

     -v verificationPolicy
             This is an advanced option not useful for regular use.  It con-
             trolls the verification policy when writing to RW type optical
             media.  Its value can be "meta", "all", or "none".  Policy "meta"
             means only the metadata are verified after they are written.
             This is the default policy.  Policy "all" means to verify data
             written, which could be several times slower than policy "meta".
             Policy "none" does not verify any data.  It is only slightly
             faster than "meta" in normal cases, but may result a corrupted
             UDF disc if the write of metadata fails.

     -s sessionStart
             This is an advanced option not useful for regular use.  When man-
             ually mounting a UDF volume with Virtual Partition, it specifies
             the start Logical Block Address of the last session where UDF
             data structures (VRS and AVDP) resides.  This value overrides the
             value obtained from the device.

     -n lastRecordedLBA
             This is an advanced option not useful for regular use.  When man-
             ually mounting a UDF volume with Virtual Partition, it specifies
             the last recorded Logical Block Address where the UDF VAT ICB
             will be searched.  This value overrides the value obtained from
             the device.

     -b blockSize
             This is an advanced option not useful for regular use.  It speci-
             fies the block size in bytes used when mounting the UDF volume.
             This value overrides the value obtained from the device.

     -p packetSizeInBlocks
             This is an advanced option not useful for regular use.  It speci-
             fies the packet size in blocks when manually mounting the UDF
             volume.  This value overrides the value obtained from the device.

     -w      This is an advanced option not useful for regular use.  It forces
             to enable the experimental packet writing function on optical
             media that has not been fully supported, such as CD-R, CD-RW,
             DVD-R, DVD+R, HD DVD-R, and BD-R.  Writing to these media does
             not work on some drives and may cause data corruption or data
             loss on some other drives.  Therefore, this flag should be used
             only by file system developers when debugging the experimental
             write functions.

     The -s, -n, -b, and -p flags are not useful in normal use.  They are
     mainly used for debugging and data recovery.  Since the -s, -n, and -p
     flags are all specified in units of block size, when any of these flags
     are specified, it is strongly recommended that the -b flag is also speci-
     fied.


SEE ALSO

     mount(2), unmount(2), fstab(5), mount(8)


BUGS

     Reading of all UDF revisions (1.02 - 2.60) on both block device (e.g.,
     hard drives and USB drives) and most optical media is supported.  Writing
     to block devices, DVD-RW and DVD+RW is supported with the following
     exceptions: (1) Cannot write Finder Info, Resource Fork, or other
     extended attributes in UDF volumes of revision 1.02 and 1.50; (2) Cannot
     write to mirrored metadata partition.


HISTORY

     The mount_udf utility first appeared in Mac OS X.

4th Berkeley Distribution      December 6, 2006      4th Berkeley Distribution

Mac OS X 10.6 - Generated Thu Sep 17 20:26:06 CDT 2009
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