This Techworld document tabulates details of Sony's DTF and Super AIT tape formats and includes road map details where available. These are both enterprise tape market products, the former for the broadcast market where it is available in standalone drives and high capacity Petasite libraries.
Super AIT is the mid-range and enterprise-level format created by implementing AIT helical scan technology on a half-inch tape. The capacities are dramatically higher due to the greater surface area available.
Both are half-inch helical scan formats and DTF may remain as a broadcast market tape with Super AIT being the mid-range and general enterprise format.
DTF stands for Digital Tape Format.
|DTF 1||DTF 2||DTF 3||DTF 4|
|Raw Transfer Rate||c12MB/sec||24MB/sec||50MB/sec||100MB/sec|
|Compressed Transfer Rate||31MB/sec||62MB/sec||129MB/sec||259MB/sec|
DTF has a quoted 2.59:1 compression ratio. The DTF 3 and DTF 4 values are speculative.
This Super Advanced Intelligent Tape format uses a longer and wider tape ribbon than the 8mm tape used for the AIT formats. It is a 12.7mm or half inch format which means that the drives can fit in the same size bays as other half inch tape formats. This means that Super AIT tape can be used in multi-format libraries using half-inch formats such as LTO and SDLT.
|SAIT 1||SAIT 2||SAIT 3||SAIT 4|
|Raw Transfer Rate||30MB/sec||60M/sec||120MB/sec||240MB/sec|
|Compressed Transfer Rate||77.7MB/sec||155.4MB/sec||310.8MB/sec||621.6MB/sec|
SAIT 1 is current. SAIT 2, 3 and 4 can be expected in 2004, 2006 and 2008 respectively. All values for SAIT 2, 3 and 4 are speculative.
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