DVD-RAM

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DVD-RAM

[¦dē¦vē¦dē ′ram]
(communications)

DVD-RAM

DVD-RAM

A rewritable DVD disc endorsed by the DVD Forum. Using phase change technology, DVD-RAMs are like removable hard disks, and the media can be rewritten 100,000 times compared to 1,000 times for DVD-RW and DVD+RW. The first DVD-RAM drives with a capacity of 2.6GB (single sided) or 5.2GB (double sided) became available in the spring of 1998. DVD-RAM Version 2 discs with 4.7GB arrived in late 1999, and double-sided 9.4GB discs in 2000. DVD-RAM drives typically read DVD-Video, DVD-ROM and all types of CD media. See DVD, DVD storage capacities, DVD+RW, DVD-RW and optical disc.


Panasonic Drive and Media
In 1998, Panasonic was the first to debut a DVD-RAM drive, which supported both caddy-based and caddyless media. DVD-RAM discs were placed in the caddy for writing, but CDs and all other DVD media were read bare. (Image courtesy of Panasonic Industrial Company.)







Phase Change Recording
In rewritable DVDs, different intensities of the laser turn bits in the phase change recording layer between a crystalline state and an amorphous state.
References in periodicals archive ?
The 5X DVD RAM media will be available in June 2004 and will be shown by Maxell at a RAM Promotion Group event in conjunction with CeBIT America in New York City.
Hitachi's new DVD camcorder models maintain the 2002 break-through design for recording DVD-R and DVD RAM while making it more convenient to carry and easier to record," said Leo Delaney, vice president of marketing for Hitachi America, Ltd.
We have ramped up our manufacturing capabilities to produce 1 million DVD RAM discs this year and will expand production to 10 to 15 million in 2002.
All three suppliers believe that the increased capacity and new features and functions of DVD RAM technology will boost the potential for DVD-RAM-based storage solutions.
Featuring twice the transfer rate of CD-R and CD-RW drives, and providing four times the capacity, the Panasonic LF-D101 DVD RAM uses removable, rewritable 2.