mount_udf — mount
a UDF filesystem
mount_udf |
[-o options]
[-s sessionStart]
[-n lastRecordedLBA]
[-b blockSize]
[-p packetSizeInBlocks]
[-v verificationPolicy]
[-w] devicePath
mountPath |
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 separated 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 controlls 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 manually
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 manually
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 specifies 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 specifies 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 specified.
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.
The mount_udf utility first appeared in
Mac OS X.