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UDF PlugFests

MDI Universal Disk Format

When it comes to communication, it's important to speak the same language. But in the world of network data storage, this isn't easy. That's because each operating system in existence today uses a proprietary file system format preventing removable writable media from being portable across operating systems. For example, writable media created using a UNIX file system cannot be read or modified with the Windows NT native file system (NTFS).

This lack of interoperability is a real problem, especially when file interchange among different platforms is required. And with a whole bunch of new removable technologies available, including new writable DVD and NFR optical disk, the problem only gets worse. Our new Universal Disk Format (UDF) technology is the perfect solution for data portability dilemmas.

Standard Procedure

MDI UDF was developed to promote the rapid adoption and disbursement of many new media technologies on multiple platforms. Based on the Optical Storage Technology Association (OSTA) UDF, MDI UDF is file system technology capable of reading a variety of media formats. MDI UDF also allows data to be written to rewritable DVD and optical disk as simply as you would to a hard disk. That means no awkward pre-staging or mastering is needed.

UDF can be thought of as the next generation of ISO 9660, the read-only file system standard that enabled CD-ROM media to be read on all operating systems. ISO 9660 was largely responsible for the success of the CD-ROM in the home and in commercial and governmental organizations worldwide. UDF goes beyond ISO 9660, however, in that it is a writable file system standard enabling files to be read/written/modified by a wide variety of operating systems.

User Friendlier

File system repair is a necessary part of a complete writable UDF solution. Over the years, MDI has developed and emphasized efficiency and speed of UDF file system repair, including optimization of code, creative use of data structures and program flow, and leverage of new operating system capabilities. MDI's vast experience in this area has yielded a robust implementation of UDF file system repair and offers invaluable data recovery in the event of inadvertent computer shutdown or power failure. That's assurance that your data is kept safe even in an emergency.

And because the data is written according to an OSTA specification, you can be assured that the information will be available on the most popular platforms. So on every platform, you're speaking the same language. That's what MDI UDF is all about.

UDF Source Code

MDI's UDF Source Code License is the perfect solution for your data portability and recovery needs. Since all data is written according to the OSTA specification, you can be assured that your information will be available on the most popular platforms. On every platform, you're speaking the same language! That's what UDF is all about.

MDI's robust implementation of UDF file system repair offers invaluable data recovery in the event of inadvertent computer shutdown or power failure. That's assurance your data is kept safe even in an emergency! If you are looking for UDF source code that has been extensively tested in a variety of hardware and software environments and under a wide range of workloads you can be assured that MDI's UDF source code is the right choice. For more information please send an email to: bizdev@mdi.com or call MDI at 1-800-228-0891, X142

More About UDF

UDF is a universal vendor-independent file system designed for data interchange and portability allowing an operating system to access (read/write/modify) data that was created by another operating system. It is a subset of an International Standards Organization (ISO) interchange standard for non-sequential recording of data, known as ISO 13346. The UDF specification is defined by the OSTA, a non-profit trade association actively promoting the use of writable optical technologies and products for storage of computer data and images.

UDF File Limits

Logical Block Size 232-1 partitions x max. partition size

File Extent Size 230-1 bytes

File Size 264-1 bytes

File Name 256 bytes

UDF Directory Limits

Directory Size 264-1 bytes

Directory Depth unlimited

Sub-directories per Directory 216-1 sub-directories

Directory Name 256 bytes

UDF Volume Limits

Volume Size unlimited

Logical Sector Size unlimited (must be multiple of 512)

Logical Sectors per Volume 232-1

Partition Size 232-1 logical sectors

Logical Volume Size 232-1 partitions x max. partition size

Volume Set Size 216-1 volumes

MDI UDF Reads MDI UDF Writes

CD-ROM

CD-R (packet-written)

CD-RW (packet-written)

DVD-ROM

DVD-R

Hard Disk

DVD-RAM

Optical Disk

UDF Platforms

Windows 2000, Windows NT, Windows 98, Windows 95, Macintosh, OS/2, DOS, NetWare, UNIX all versions including, FreeBSD, Linux.

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UDF File Limits
Logical Block Size	232-1 partitions x max. partition size
File Extent Size	230-1 bytes
File Size	264-1 bytes
File Name	256 bytes
UDF Directory Limits
Directory Size	264-1 bytes
Directory Depth	unlimited
Sub-directories per Directory	216-1 sub-directories
Directory Name	256 bytes
UDF Volume Limits
Volume Size	unlimited
Logical Sector Size	unlimited (must be multiple of 512)
Logical Sectors per Volume	232-1
Partition Size	232-1 logical sectors
Logical Volume Size	232-1 partitions x max. partition size
Volume Set Size	216-1 volumes
MDI UDF Reads	MDI UDF Writes
CD-ROM CD-R (packet-written) CD-RW (packet-written) DVD-ROM DVD-R	Hard Disk DVD-RAM Optical Disk
UDF Platforms
Windows 2000, Windows NT, Windows 98, Windows 95, Macintosh, OS/2, DOS, NetWare, UNIX all versions including, FreeBSD, Linux.