AIT – Advanced Intelligent Tape – family of tape storage

(Advanced Intelligent Tape (AIT) was the first multisourced tape standard targeted at the midrange server market, which is typically characterised by systems that support 2 to 129 users in a commercial environment. Introduced in 1996, AIT was designed to support this key market segment with a combination of exceptional data integrity, speed and capacity. Several breakthroughs make this possible including stronger, thinner media that is more stable and has better coatings than previously available, new head technologies, higher levels of integration and a unique Memory-In-Cassette (MIC) feature. The result is multi-Gbyte, high-performance tape drive systems with very low frequencies of error that are perfect for tape libraries and robotic applications associated with midrange systems backup. Originally consisting of a 16Kbit erasable electrical programmable read-only memory (EEPROM) chip that is mounted within the data cartridge and includes a five-pin contact connector, the MIC hardware was uprated to a 64Kbit device in 1999. When the data cartridge is inserted, a mating connector within the drive contacts the MIC connector and data is read directly from the MIC. The MIC chip essentially stores all of the information normally found on the first segments of tapes used in other technologies. This includes indices to mark where data files are located on the tape and additional data fields that allow application software to write information that is separate from the tape format. Because the drive firmware estimates how far to fast-forward or rewind, it no longer needs to read individual address ID markers as the tape is moving. As the target zone is approached, the motors slow to pick up the ID markers for...

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