DVDRAMdrive, DVDROM, DVDRW, DVDRW, DVDRdrive

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	DVD-RAM drive <DVD-RAM drive> Reading: D buoy D ram drive Field: Storage > optical disk > DVD > DVD-RAM drive
At one of the peripheral device of the computer, it rewrites at anything degree and the device which does the reading and writing of DVD-RAM which is possible DVD. Other than DVD-RAM, the read-out of CD-ROM and CD-R, CD-RW, DVD-ROM and DVD-R is possible. It cannot write in to CD-RW. Only the media of one side 2.6GB where record possible capacity is smaller than DVD-ROM it could handle DVD-RAM of the 1st generation, but in 2nd generation DVD-RAM the single sided 4.7GB record which is similar to DVD-ROM has become possible. Also DVD-RAM which can be recorded to both sides exists. Maximum data rate with the 2.6GB media 3MB/s is slow rather with 1.5MB/s and the 4.7GB media.
DVD-ROM Reading: D buoy D ROM Full spelling: Digital Versatile Disk Read Only Memory Field: Storage > optical disk > DVD > DVD-ROM
In read-only DVD, it hits to CD-ROM as it is called in CD. Maximum memory capacity with 4.7GB and single sided 2 layer record has become 8.5GB and both sides each 1 layer record 9.4GB with single sided 1 layer record. It is utilized in distribution of image work such as distribution and movie of the software for the computer.
DVD-RW Reading: [deibuideiarudaburiyu] Field: Storage > optical disk > DVD > DVD-RW
The DVD forum standardized, it rewrites, standard of possible type DVD. It rewrites the DVD forum similarly and it prepares DVD-RAM as a possible type DVD standard, but DVD-RAM DVD-RW focuses to image record use as the one for data logging vis-a-vis being prepared. DVD-RW standard DVD-R for General and compatibility is high, it has the efficiency which is equal to DVD-R excluding extremely part such as reflectance ratio of the laser. However, becoming cause, for laser reflectance ratio to be low, because there is also the DVD-ROM drive where playback becomes impossible, playback compatibility in DVD-ROM drive is inferior to DVD-R more or less. As for maximum record capacity the same as DVD-R 4.7GB (as for the 3.95GB edition like DVD-R it does not exist). Furthermore, DVD+RW which DVD+RW Alliance propels it does not have compatibility completely.
DVD+RW <PC-RW> Reading: [deibuideipurasuarudaburiyu] Full spelling: Digital Versatile Disk ReWritable Alias: Phase Change ReWritable Field: Storage > optical disk > DVD > DVD+RW
Standard of the rewriting possible DVD which 3 corporations of SONY, the Philips Electronics corporation and the Hewlett Packard corporation decide. In the actually product base Ricoh has propelled strongly. Can read out with many DVD-ROM drives it is made the merit that compatibility on DVD-ROM and specification is high in comparison with DVD-RW. Memory capacity early ones one side 3.0GB, presently is the same one side as DVD-ROM 4.7GB. As for field of rewriting possible DVD, two specifications which do not have the compatibility, DVD-RW and DVD+RW have unfolded the leadership dispute.
DVD-R drive <DVD-R drive> Reading: D buoy D earl drive Field: Storage > optical disk > DVD > DVD-R drive
At one of the peripheral device of the computer, just one time the device which does the reading and writing of DVD-R which is entry possible DVD. Other than DVD-R, it is possible to read out CD-ROM and CD-R, CD-RW and DVD-ROM. If the entry to CD-R/RW especially stops corresponding, it is not possible. Record capacity with version 1.0 standard is 4.7GB with 3.95GB and version 2.0 standard.