11 Facts About CD-ROM XA

CD-ROM XA is a pre-pressed optical compact disc that contains data.

The CD-ROM XA was later designed an extension of the CD-DA, and adapted this format to hold any form of digital data, with an initial storage capacity of 553 MB.

The CD-ROM XA was announced in 1984 and introduced by Denon and Sony at the first Japanese COMDEX computer show in 1985.

Some computers which were marketed in the 1990s were called "multimedia" computers because they incorporated a CD-ROM XA drive, which allowed for the delivery of several hundred megabytes of video, picture, and audio data.

CD-ROM XA is an extension of the Yellow Book standard for CD-ROMs that combines compressed audio, video and computer data, allowing all to be accessed simultaneously.

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CD-ROM XA defines two new sector layouts, called Mode 2 Form 1 and Mode 2 Form 2 .

CD-ROM XA capacities are normally expressed with binary prefixes, subtracting the space used for error correction data.

The capacity of a CD-ROM XA depends on how close the outward data track is extended to the disc's outer rim.

CD-ROM XA drives are rated with a speed factor relative to music CDs.

For example, a CD-ROM XA drive that can read at 8× speed spins the disc at 1600 to 4000 rpm, giving a linear velocity of 9.

Problems with vibration, owing to limits on achievable symmetry and strength in mass-produced media, mean that CD-ROM XA drive speeds have not massively increased since the late 1990s.