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In a test of the SD-L902A by C't computer magazine with Verbatim discs, the written HD DVD-Rs suffered from high noise levels, [96] as a result, the written discs could not be recognized by the external HD DVD drive of the Xbox 360, though they could be read back by the SD-L902A.
If the DVD burner recognizes the discs it means that the disc has been tested by the drive manufacturer to achieve the best possible burn using an optimal write strategy. The strategy is stored in the firmware. Writing to a disc with no MID code or a code that is not recognized can result in inaccurate recording and data read-back problems.
DVD-Video is a consumer video format used to store digital video on DVDs. DVD-Video was the dominant consumer home video format in Asia, North America, [5] Europe, and Australia in the 2000s until it was supplanted by the high-definition Blu-ray Disc; both receive competition as delivery methods by streaming services such as Netflix and Disney+.
Such discs are a form of DVD-ROM because data can only be read and not written or erased. Blank recordable DVD discs (DVD-R and DVD+R) can be recorded once using a DVD recorder and then function as a DVD-ROM. Rewritable DVDs (DVD-RW, DVD+RW, and DVD-RAM) can be recorded and erased many times.
^3 May not work in some early-model DVD-ROM drives. CD-R would not work in any drive that did not have a 780 nm laser. CD-RW compatibility varied. [71] ^4 DVD+RW discs did not work in early video players that played DVD-RW discs.
DVD recorder drives can be used in conjunction with DVD authoring software to create DVDs near or equal to commercial quality, and are also widely used for data backup and exchange. As a general rule, computer-based DVD recorders can also handle CD-R and CD-RW media; in fact, a number of standalone DVD recorders use drives designed for computers.
Hitachi-LG Data Storage (HLDS, HL-DT-ST or H-L Data Storage), a 51-49 joint venture between Hitachi, Ltd. and LG Electronics, [2] is a manufacturer of DVD and Blu-ray optical disc drives [3] for desktop computers and laptops. Founded in late 2000, the company began operation in January 2001. [4] In 2006, HLDS began developing Blu-ray Disc ...
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.