Universal Disk Format (UDF):
A File System Format
in Transition... Defect Management From Software to Hardware
It was designed for read-write
interoperability between all the major operating systems as well as
compatibility between rewritable and write-once media. DVDs
are based on the UDF Format, and UDF is an optional second standard for
CD-R and CD-RW disks in a process termed Packet Writing using Roxio's
DirectCD or Nero's InCD.
CD-MRW will of
course change all of that since new CD-MRW Drives will have this Packet
Writing capability built-in for driver letter access. Unlike UDF version
1.50, where defect management relied on software, (CD
Mount Rainier Rewrite) CD-MRW ensures that
defect management is handled through hardware (directly by the recorder
based on the UDF File System Format. UDF is an optional second standard
for CD-R and CD-RW Disks. CD-RWs support UDF (Universal Disk Format),
which is similar to the File System on a
Expect the floppy to disappear when CD
Mount Rainier Rewrite (UDF 2.0.1 File System) Technology takes
over! And Iomega came out with a Zip750 Magnetic Storage? Iomega is way
out of touch with Reality & Technology! What were they thinking?
Note: Slipstream Technology - USB
Boot Devices - It's here and it works IF the MotherBoard
Bios supports it! (3/19/2003)
Universal Disk Format:
- MDI.com -
Storage Your Way - UDF: MDI UDF is File System Technology capable
of reading a variety of Media Formats.
Disk Format - a searchStorage definition
Mount Rainier explanation from Philips
This specification describes the Universal
Disk Format, a file system for Optical Media
developed by OSTA - Optical Storage
This specification, fully compliant with
the ISO 13346 standard, is intended for developers who intend to implement
UDF to enable file interchange among different operating systems. DVDs are
based on the UDF format, and UDF is an optional second standard for CD-R
and CD-RW disks. A OSTA
Multiread Specifications drive can read (Redbook) CD-DA Digital Audio,
CD-ROM, CD-R and CD-RW disks.
- The CDFS format has a number of restrictions due to its' simplicity.
- Directory and file names must be fewer than 32 characters long.
- Directory trees can be no more than eight levels deep.
CDFS is considered a legacy format because the industry has adopted
the Universal Disk Format (UDF) as the standard for read-only media.
TR-71: UDF Bridge Format
- The Windows 2000 UDF file system implementation is compliant
with ISO 13346 and supports UDF versions 1.02 and 1.5. OSTA (Optical
Storage Technology Association) defined UDF in 1995 as a format to
replace CDFS for magneto-optical storage media, mainly DVD-ROM. UDF is
included in the DVD specification and is more flexible than CDFS. UDF
file systems have the following traits:
- File names can be 255 characters long.
- The maximum path length is 1023 characters.
- File names can be uppercase and lowercase.
Although the UDF format was designed with rewritable Media in mind,
the Win2000 UDF driver (\Winnt\System32\Drivers\Udfs.sys) provides
- Software Architects SAI:
Drive Tune Up: "The OSTA UDF specification allows for 1
terabyte and above volume sizes in UDF." Claims cross
platform compatibility (PC & MAC) for Hard Disk Drives by
formatting same for UDF (12/8/2002).
supporting UDF: "The overall goal of UDF is to facilitate
data interchange independent of hardware, software and operating
system by standardizing on the way the information is stored and
organized on the disk."
"Supports very large capacity disks - UDF can store and
manage data at the TeraByte level on a single Volume." (1/17/2004)
UDF Reader with
extended capabilities to search and recover the lost files
o x i o UDF Volume Reader for Windows: This file enables some
MultiRead CD-ROM drives to read UDF formatted CD-RW discs such as
those written with Roxio's DirectCD.
Download site: InCD & EasyWrite Reader