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Of the 171 failures, 60% were due to a general hardware failure (and thus fell under the 3 year extended warranty). And of the remaining 40% which were not covered by the extended warranty, 18% were disc read errors, 13% were video card failures, 13% were hard drive freezes, 10% were power issues and 7% were disc tray malfunctions.
Drives which can read but not write data are "-ROM" (read-only memory) drives, even if they can read from writable formats such as "-R" and "-RW". Some drives have mixed read and write capabilities, such as the TSST TS-LB23, which can only read Blu-ray discs but read and write CDs and DVDs.
The TOC is of such vital importance for the disc that if it is not read correctly by the player, the CD could not be played back. That is why it is repeated three times before the first music program starts. The lead out area in the end (the outer peripheral) of the disc tells the player that disc has come to an end.
The -use-the-force-luke=notray keeps the tray closed after the burning process to prevent it from collecting dust when the computer is not in use. -overburn tells the drive to try burning beyond the available capacity of the disc. However, if the drive refuses to write beyond a certain point, the program can not overrule the drive.
The drive plays standard DVDs in addition to HD DVD titles; however it does not read Xbox or Xbox 360 game discs, Audio CDs or mixed media CDs. All Xbox 360 games continued to use DVD-9 media. No Xbox 360 with a built-in HD DVD drive was ever released. [9]
Disc quality: optical disc recorders detect the available speed options based on the data which is available on the disc itself. However, some low-quality discs make a high-speed option available to the software, while the burning process can never reach that speed in practice. The reading and writing process may not happen at a steady speed.
By measuring the reflected intensity change with a photodiode, a modulated signal is read back from the disc. [76] To accommodate the spiral pattern of data, the laser is placed on a mobile mechanism within the disc tray of any CD player. This mechanism typically takes the form of a sled that moves along a rail.
For example, a CD-ROM drive that can read at 8× speed spins the disc at 1600 to 4000 rpm, giving a linear velocity of 9.6 m/s and a transfer rate of 1200 Kbyte/s. Above 12× speed most drives read at Constant angular velocity (CAV, constant rpm) so that the motor is not made to change from one speed to another as the head seeks from place to ...