-=PCTechTalk=- Re: DVD RAM
- From: Jo Ann <bookworm54@xxxxxxx>
- To: pctechtalk@xxxxxxxxxxxxx
- Date: Sat, 19 May 2007 20:52:32 -0400
DVD-RAM
DEFINITION - DVD-RAM is a DVD (optical disc) technology for
high-capacity data storage for computers. Like ordinary random access
memory (RAM), it can be repeatedly read, written to, and erased.
Intended mostly for removeable computer storage, DVD-RAM provides the
capabilities of Rewriteable CD (CD-RW) - users can run programs from the
discs, copy files to them and rewrite or delete them. However, with a
storage capacity of up to 9.4 gigabytes (GB) per double-sided disc,
DVD-RAM has many times the capacity of CD-RW.
DVD-RAM discs can be rewritten 100,000 times, 100 times more than either
DVD-RW or DVD+RW, the other two rewritable DVD formats. DVD-RAM drives
can usually read both DVD Video discs and DVD-ROM discs, as well as any
type of CD. Like other rewriteable DVD formats, DVD-RAM uses phase
change recording, in which varying laser intensities cause targeted
areas in the phase change recording layer to alternate between an
amorphous and a crystalline state.
Don Wilcox wrote:
> What can a DVD RAM disk do that can't be done with other less expensive disks?
>
> Don
>
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