mount_udf(8) [netbsd man page]
MOUNT_UDF(8) BSD System Manager's Manual MOUNT_UDF(8) NAME
mount_udf -- mount an UDF file system SYNOPSIS
mount_udf [-c] [-g gid] [-o options] [-t gmtoff] [-s session] [-u uid] special node DESCRIPTION
The mount_udf command attaches the UDF file system residing on the specified special device node on the location indicated with node. Anonymous files stored on the UDF disc will be represented and saved in the specified uid:gid pair. If unspecified, it will default to nobody:nobody. Both uid and gid can be either specified with their names as with their numerical equivalents. -c Close the session after unmount creating remountable snapshots. Closing a session also allows -ROM devices to read the disc cre- ated. Note that this option only makes sense when mounting sequential recordable media like CD-R and DVD*R. -g gid Set the group of anonymous files on the file system. The default group is the nobody group. -o options Use the specified mount options as specified in mount(8). -s session Select the session session to be mounted instead of the default last one. Implements readonly snapshots on sequential media. Positive session values indicate an absolute session number. Negative session values are relative to the last session found on the disc. Note that this option only makes sense when mounting sequential recordable media like CD-R and DVD*R. -t gmtoff Set the time zone offset (in seconds) from UTC to gmtoff, with positive values indicating east of the Prime Meridian. If not set, the user's current time zone will be used. -u uid Set the owner of anonymous files on the file system. The default owner is the user nobody. SEE ALSO
mount(2), vnd(4), fstab(5), mount(8), umount(8), vnconfig(8) NOTES
UDF is a file system defined by the OSTA standardization group and is tailored for data interchange on optical discs (like CDs and DVDs) between different operating systems. Its also more and more common on other media like Compact Flash (CF) cards. Read and write access is supported for all media types that CD/DVD type drives can recognise including DVD-RAM. BluRay support is prelimi- nary; read-only access should work fine but write support is experimental. Implemented and tested media types are CD-ROM, CD-R, CD-RW, CD-MRW, DVD-ROM, DVD*R, DVD*RW, DVD+MRW, DVD-RAM but the same code can also read HD-DVD and BluRay discs. Discs created and written by UDFclient, Nero's InCD, and Roxio's DirectCD/Drag2Disc can be read without problems. Both open and closed media are supported so there is no need to close discs or sessions. All current UDF versions up to version 2.60 are supported. Hard disk partitions and vnd(4) devices may also be mounted. Note when mounting a vnd(4) device it might be necessary to specify the file image sector size in the geomspec when creating the vnd(4) device or the disc sector size will be used. BUGS
Write support for UDF version 2.50 is not completely mature and UDF version 2.01 should be used if possible; this is also the default format. Due to lack of test media and recording devices, BluRay support and in particular BluRay-R is still preliminary as of writing. BSD
July 13, 2009 BSD
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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 indi- cated 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. 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