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Internal mechanism of a DVD-ROM Drive. See text for details. Read and write speeds for the first DVD drives and players were 1,385 kB/s (1,353 KiB/s); this speed is usually called "1×". More recent models, at 18× or 20×, have 18 or 20 times that speed.
^7 Will work in all drives that read DVD-R as compatibility ID byte is the same. ^8 Recorder firmware may blacklist or otherwise refuse to record to some brands of DVD-RW media. ^9 DVD+RW format was released before DVD+R. All DVD+RW only drives could be upgraded to write DVD+R discs by a firmware upgrade. ^10 As of April 2005, all DVD+R DL ...
Newer drives use RPC-2 firmware, which enforces the DVD region coding at the hardware level. These drives can often be reflashed or hacked with RPC-1 firmware, effectively making the drive region-free. This may void the drive's warranty. [10] Some drives may come set as region-free, so the user is expected to assign their region when they buy it.
DVD-ROM drives from Toshiba, Pioneer, Panasonic, Hitachi, and Sony began appearing in sample quantities as early as January 1997, but none were available before May. The first PC upgrade kits (a combination of DVD-ROM drive and hardware decoder card) became available from Creative Labs, Hi-Val, and Diamond Multimedia in April and May 1997.
Modern DVD drives use constant angular velocity to allow transferring data at the highest supported physical rotation speed and/or random access without needing to adjust the physical rotation speed on every jump, and zoned constant linear velocity for writing reliably with different data rates in different zones.
The last DVD-RAM Specification, DVD-RAM2 (also called RAM2 or Class 1), is not compatible with DVD drives that do not specifically allow reading DVD-RAM2 discs. [12] DVD-RAM2 medium was brought to the market in Japan, [13] [14] but was not launched worldwide. [15] Some high end products such as IBM System p mainframes require DVD-RAM instead of ...
DVD±R/W (also written as, DVD±R/RW, DVD±R/±RW, DVD+/-RW, DVD±R(W) and other arbitrary ways) handles all common writable disc types, but not DVD-RAM. [1] A drive that supports writing to all these disc types including DVD-RAM (but not necessarily including cartridges or 8cm diameter discs) is referred to as a "Multi" recorder. [2]
This list includes both CD, DVD and Blu-ray recordable and rewritable media manufacturers (like Ritek), and disc replicators (companies that replicate discs with pre-recorded content, like Sony DADC).
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