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The DVD and Blu-ray discs hold a higher capacity of data, so reading or writing those discs in the same 74-minute time-frame requires a higher data transfer rate. Drive speed can be limited intentionally to reduce noise from the drive or slow down ripping, such as the firmware component Riplock.
Riplock is a firmware component of some computer DVD and Blu-ray drives that enforces a speed ceiling below a drive's physical capabilities (typically 2×) when DVD-Video or BDMV data is being read. [1] CDs are usually not affected, nor are DVDs or Blu-rays not authored as videodiscs. Riplock's stated purpose is to reduce noise during video ...
^4 DVD+RW discs did not work in early video players that played DVD-RW discs. This was not due to any incompatibility with the format but was a deliberate feature built into the firmware by one [which?] drive manufacturer. ^5 Read compatibility with existing DVD drives may vary greatly with the brand of DVD+R DL media used. Also drives that ...
DVD recorder drives manufactured since January 2000 are required by the DVD consortium to respect DVD region codes when reading a disc. The drives are incapable of assigning region codes when writing a disc as this is stored on a part of the disc to which PC based and standalone video recorders do not have write access.
The physical format of MRW on the disk is managed by the drive's firmware, which remaps physical drive blocks into a virtual, defect-free space. Thus, the host computer does not see the physical format of the disk, only a sequence of data blocks capable of holding any filesystem. [1]
Discs can be read in many DVD devices (older units are less compatible) and can only be created using DVD+R DL and Super Multi drives. DL drives started appearing on the market during mid-2004, [1] [2] at prices comparable to those of existing single-layer drives. [citation needed] As of March 2011 DL media is up to twice as expensive as single ...
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The data are stored on the disc with a laser or stamping machine, and can be accessed when the data path is illuminated with a laser diode in an optical disc drive that spins the disc at speeds of about 200 to 4,000 RPM or more, depending on the drive type, disc format, and the distance of the read head from the center of the disc (outer tracks ...