Media Identification Code

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The Media Identification Code (MID) is used on DVD-R, DVD+R and DVD-RAM 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 discs.

Contents

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. 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.[ citation needed ]

Displaying the MID

The following programs can be used to display the contents of the MID

With Windows

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:             [HL-DT-ST][DVDRAM GSA-4083N][1.00]  GET [CURRENT] CONFIGURATION:   Mounted Media:      14h, DVD-RW Sequential   '''Media ID:           TDK502sakuM3'''   Current Write Speed: 2.0x1385=2770KB/s   Write Speed #0:     2.0x1385=2770KB/s  GET [CURRENT] PERFORMANCE:   Write Performance:  2.0x1385=2770KB/s@[0 -> 2254431]   Speed Descriptor#0: 02/2254431 R@3.3x1385=4584KB/s W@2.0x1385=2770KB/s  READ DVD STRUCTURE[#10h]:   Media Book Type:    00h, DVD-ROM book [revision 0]   Legacy lead-out at: 2298496*2KB=4707319808  READ DVD STRUCTURE[#0h]:   Media Book Type:    32h, DVD-RW book [revision 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

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