UDFS(4FS) File Systems UDFS(4FS)

NAME

udfs - universal disk format file system

DESCRIPTION

The udfs file system is a file system type that allows user access to
files on Universal Disk Format (UDF) disks from within illumos. Once
mounted, a udfs file system provides standard file system operations
and semantics. That is, users can read files, write files, and list
files in a directory on a UDF device and applications can use standard
UNIX system calls on these files and directories.

Because udfs is a platform-independent file system, the same media can
be written to and read from by any operating system or vendor.

Mounting File Systems

udfs file systems are mounted using:

mount -F udfs -o rw/ro device-special

Use:

mount /udfs
if the udfs and device special file /dev/dsk/c0t6d0s0 are valid and the
following line (or similar line) appears in your Pa /etc/vfstab file:

/dev/dsk/c0t6d0s0 - /udfs udfs - no ro

The udfs file system provides read-only support for ROM, RAM, and
sequentially-recordable media and read-write support on RAM media.

The udfs file system also supports regular files, directories, and
symbolic links, as well as device nodes such as block, character, FIFO,
and Socket.

SEE ALSO

vfstab(5), mount(8), mount_udfs(8)

NOTES

Invalid characters such as "\0" and "/" and invalid file names such as
" ." "." and ".." will be translated according to the following rule:

Replace the invalid character with an "_", then append the file name
with "#" followed by a 4 digit hex representation of the 16-bit CRC of
the original FileIdentifier. For example, the file name ".." will
become "__#4C05".

illumos June 20, 2021 illumos