MOUNT_UDF(8) BSD System Manager's Manual MOUNT_UDF(8)NAMEmount_udf — mount a UDF filesystem
SYNOPSISmount_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 ALSOmount(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
