The Media Identification Code (MID) is used on
DVD-R
DVD recordable and DVD rewritable are a collection of optical disc formats that can be written to by a DVD recorder and by computers using a DVD writer. The "recordable" discs are write-once read-many (WORM) media, where as "rewritable" discs a ...
,
DVD+R and
DVD-RAM
DVD-RAM (DVD Random Access Memory) is a DVD-based disc specification presented in 1996 by the DVD Forum, which specifies rewritable DVD-RAM media and the appropriate DVD writers. DVD-RAM media have been used in computers as well as camcorde ...
discs to identify the manufacturer and to assist the
DVD burner to select the best write strategy for the inserted media. The technology is inherited from the
ATIP code used on
CD-R
CD-R (Compact disc-recordable) is a digital media, digital optical disc data storage device, storage format. A CD-R disc is a compact disc that can only be Write once read many, written once and read arbitrarily many times.
CD-R discs (CD-Rs) ...
discs.
If the DVD burner recognizes the discs it means that the disc has been tested by the drive manufacturer to achieve the best possible burn using an optimal write strategy. The strategy is stored in the
firmware
In computing
Computing is any goal-oriented activity requiring, benefiting from, or creating computer, computing machinery. It includes the study and experimentation of algorithmic processes, and the development of both computer hardware, h ...
. Writing to a disc with no MID code or a code that is not recognized can result in inaccurate recording and data read-back problems.
Displaying the MID
The following programs can be used to display the contents of the MID
With Windows
* instal
DVDInfoProby Nic Wilson (full 14-day trial available without any adverts)
* instal
DVDIdentifierby Kris Schoofs (freeware)
With Linux
Ubuntu and other Linux systems have
dvd+rw-tools installed by default, which provides a command to display the media data:
$ dvd+rw-mediainfo /dev/scd1
INQUIRY: L-DT-STDVDRAM GSA-4083N] .00GET URRENTCONFIGURATION:
Mounted Media: 14h, DVD-RW Sequential
Media ID: TDK502sakuM3
Current Write Speed: 2.0x1385=2770KB/s
Write Speed #0: 2.0x1385=2770KB/s
GET URRENTPERFORMANCE:
Write Performance: 2.0x1385=2770KB/s@ -> 2254431 Speed Descriptor#0: 02/2254431 [email protected]=4584KB/s [email protected]=2770KB/s
READ DVD STRUCTURE 10h
Media Book Type: 00h, DVD-ROM book evision 0 Legacy lead-out at: 2298496*2KB=4707319808
READ DVD STRUCTURE 0h
Media Book Type: 32h, DVD-RW book evision 2 Last border-out at: 2045*2KB=4188160
READ DISC INFORMATION:
Disc status: complete
Number of Sessions: 2
State of Last Session: reserved/damaged
Number of Tracks: 1
READ FORMAT CAPACITIES:
formatted: 2254432*2048=4617076736
00h(800): 2297888*2048=4706074624
10h(10): 2297888*2048=4706074624
15h(10): 2297888*2048=4706074624
With Mac OS X
drutil status
See also
*
Book type
*
Burst cutting area
*
Absolute Time in Pregroove
Absolute Time in Pregroove (ATIP) is a method of storing information on an optical medium, used on CD-R and CD-RW. ATIP information is only readable on CD-R and CD-RW drives, as read-only drives do not need the information stored on it. The infor ...
*
Wobble frequency Optical discs, with the exception of DVD-RAM, have their data encoded on a single spiral, or a ''groove'', which covers the surface of the disc. In the case of recordable media, this spiral contains a slight sinusoidal deviation from a perfect spira ...
*
Content ID
Content ID is a digital fingerprinting system developed by Google which is used to easily identify and manage copyrighted content on YouTube. Videos uploaded to YouTube are compared against audio and video files registered with Content ID by co ...
External links
Write Strategies for high performance DVD+R/RWDVD Identifier(a utility software program for Microsoft Windows)
DVD
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