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Newer drives use RPC-2 firmware, which enforces DVD region coding at the hardware level. See DVD region code#Computer DVD drives for further information. Some RPC-2 drives can be converted to RPC-1 with the same features as before by using alternative firmware on the drive, or on some drives by setting a secret flag in the drive's EEPROM .
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.
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.
DVD Profiler permits the adding of DVDs (since V3.0, HD DVDs and Blu-ray Discs, since V4.0 Ultra HD Blu-rays) by entering the UPC/EAN, inserting the disc itself into the computer's DVD drive or searching by title. Users can upload their collection to the internet to provide other users the possibility to view their DVD profiles.
The DVD specifications created and updated by the DVD Forum are published as so-called DVD Books (e.g. DVD-ROM Book, DVD-Audio Book, DVD-Video Book, DVD-R Book, DVD-RW Book, DVD-RAM Book, DVD-AR (Audio Recording) Book, DVD-VR (Video Recording) Book, etc.). [1] [2] [3] DVD discs are made up of two discs; normally one is blank, and the other ...
But a second write-once format DVD+R emerged in 2002, leading to a brief format war before dual format drives became common. A read-write format, DVD-RW, was introduced in 1999, but like earlier CDs it could not be read by "normal" DVD drives. Over time, improvements led to most newer DVD drives being able to read any of these media. [15]
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If the drive has to seek forwards, the sector's original content "Jill" is returned. If the drive has to seek backwards, the sector's twin "Mary" is returned. A protected program can check whether the CD-ROM is original by positioning the drive behind sector 6553 and then reading from it — expecting the Mary version to appear.