Drive Letter Access

Drive Letter Access
Drive Letter Access
Developer(s) Sonic Solutions
Stable release 5.21 build 01C / April 30, 2008
Operating system Windows
Type optical disc authoring software
License proprietary

Drive Letter Access (DLA) is a commercial packet writing application for the Microsoft Windows operating system that allows optical disc data storage devices to be used in a manner similar to floppy disks. DLA is a packet writing technology for CD and DVD media that uses the UDF file system.

Roxio Burn was introduced on April 30, 2009.[1] As a replacement for DLA, it remedies compatibility issues Internet Explorer 8.[2]



DLA was originally developed by VERITAS Software and later sold to Sonic Solutions in 2002. It is very popular mainly because it was and still is shipped with a majority of CD and DVD recording drives, where DLA comes as a custom OEM version for the branded drive. Most PC systems from Dell, HP, IBM, Sony and Toshiba come with DLA pre-installed or prepared for installation; also, an OEM version can often be downloaded for the specific computer system.


To use an optical medium such as a CD-R, CD-RW, DVD±R or DVD±RW just like a floppy drive it is necessary to utilize a technique called packet writing. After formatting the optical media it is then possible to write data in small packets, hence the name “packet writing.” The optical drive unit has to support the ability to write in small units, which all modern CD and DVD recording drives do. This way it is possible to save files onto optical media, as well as change, rename or delete them, or copy files separately onto the media.

Without packet writing, optical media like the above mentioned would have to be written on in one big block, like Disc At Once (DAO), Session At Once (SAO) and Track At Once (TAO), because these media types normally do not support sectors. After formatting with packet writing the media is sectored in blocks that can be written to individually. The preferred file system is the Universal Disk Format (UDF) in versions from 1.50 onward, which is also used by DLA.

Packet writing is not required for writing DVD-RAM. DVD-RAM media are already sectored (which can be seen when looking at the surface of an empty DVD-RAM disc) and the hardware logic of DVD-RAM capable drives supports sectored read/write operations as required by the DVD-RAM standard. However, for Windows up to 2000 DLA will also add support for DVD-RAM together with the UDF file system, for Windows XP DLA will only add the UDF support.
DLA also supports the Mount Rainier standard with MRW capable drives. For Windows up to XP DLA will provide this functionality as well as the UDF support.

Windows XP is the first Windows operating system to support DVD-RAM. Windows Vista is the first Windows operating system to support full UDF functionality (UDF up to version 2.50, full support meaning read and write operations) and Mount Rainier.


DLA is available only for Microsoft Windows operating systems and only in the English language.

  • Version 4.95 runs on Windows 98SE, Me, NT 4.0, 2000 and XP.
  • Version 5.21 is the most recent version for Windows 98SE, Me, 2000 and XP.

Note: Currently, most OEM versions officially support only Windows 2000 and XP; however, DLA itself also runs on older versions of Windows, like Windows 98 Second Edition and Windows Me, as well as Windows NT 4.0.
Windows Vista is not supported.

Known problems

  • DLA is not compatible with Internet Explorer 8.
  • DLA can cause stop errors (BSOD) on the Windows Server 2003 operating system.
  • DLA can lock up a Windows XP system when a rewritable (RW) disc is inserted.
  • DLA may prevent ejection of media from an optical drive. When this occurs, a solution is to restart the operating system.
  • DLA may prevent installation of a program distributed on a rewritable CD or DVD. A solution is to deactivate DLA as follows:
  1. Launch Windows Explorer or open its My Computer component.
  2. Select the RW drive.
  3. Right click on the drive.
  4. Click "Properties"
  5. Click the "Hardware" tab
  6. Deselect (uncheck) Use with DLA

See also

Techniques used by DLA:

Competing applications:

  • Nero InCD
  • Roxio Drag-to-Disc (formerly Adaptec DirectCD)


External links

Wikimedia Foundation. 2010.

Игры ⚽ Нужно сделать НИР?

Look at other dictionaries:

  • Drive Letter Access — Entwickler Sonic Solutions Aktuelle Version 5.21 build 01C (30. April 2008) Betriebssystem Windows 98SE bis XP Kategorie Brennprogramm …   Deutsch Wikipedia

  • Drive letter assignment — is the process of assigning alphabetical identifiers to physical or logical disk drives or partitions (drive volumes) in the root filesystem namespace; this usage is now mostly found in Microsoft operating systems. Unlike the concept of UNIX… …   Wikipedia

  • Drive mapping — is how Microsoft Windows and OS/2 associate a local drive letter (A through Z) with a shared storage area to another computer over a network. After a drive has been mapped, a software application on a client s computer can read and write files… …   Wikipedia

  • Iomega Zip drive — The Zip drive is a medium capacity removable disk storage system, introduced by Iomega in late 1994. Originally, Zip disks had a capacity of 100 MB, but later versions increased this to first 250 MB and then 750 MB. The format became the most… …   Wikipedia

  • drive-by porn — n. Sexually explicit images viewable on a video screen in a nearby vehicle. Also: drive by pornography, drive by smut. Example Citations: It was like when a friend tells you too many details about their personal life, says Jess Mortimer, who… …   New words

  • Virtual drive — Virtual disc redirects here. It is not to be confused with Virtual disk image. A virtual drive in computing is a device that to the operating system appears to be an ordinary physical disk drive, with disc images substituted for disc reading… …   Wikipedia

  • GMail Drive — is a free third party Windows Shell namespace extension ( add on ) for Google s Gmail. GMail Drive is not supported by Google. It allows a user to access a virtual drive stored in a Gmail e mail account by causing the contents of the Gmail… …   Wikipedia

  • National Rural Letter Carriers' Association — Full name National Rural Letter Carriers Association Founded 1903 Country United States Key people Jeanette Dwyer, President Ronnie Stutts, Vice President …   Wikipedia

  • Controlled-access highway — Freeway redirects here. For other meanings, see Freeway (disambiguation). A freeway with a wide grass median (Highway 402 in Canada) A controlled access highway is a highway designed exclusively for high speed vehicular traffic, with all traffic… …   Wikipedia

  • Open Letter to Hobbyists — Bill Gates s Open Letter to Hobbyists from the Homebrew Computer Club Newsletter, January 1976 The Open Letter to Hobbyists was an open letter written by Bill Gates, the co founder of Microsoft, to early personal computer hobbyists, in which… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”