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{{short description|Discontinued magnetic tape data storage format}}
'''Advanced Intelligent Tape''' ('''AIT''') is a high-speed, high-capacity [[magnetic tape data storage]] format developed and controlled by [[Sony]]. It competes mainly against the [[Digital Linear Tape|DLT]], [[Linear Tape-Open|LTO]], [[Digital Data Storage|DAT/DDS]], and [[VXA]] formats. AIT uses a cassette similar to [[Video8]]. '''Super AIT''' ('''SAIT''') is a higher capacity variant using wider tape in a larger, single-spool cartridge. Both AIT and SAIT use the [[helical scan]] method of reading and writing the tape.▼
{{more citations needed|date=August 2012}}
▲'''Advanced Intelligent Tape''' ('''AIT''') is a discontinued high-speed, high-capacity [[magnetic tape data storage]] format developed and controlled by [[Sony]]. It was introduced in 1996 to utilise Advanced Metal Evaporated (AME) technology. It
[[Image:AIT tapes.jpg|thumb|250px|AIT tapes.]]
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== Form factors ==
AIT technology was available in two form factors.
* AIT – 8 mm, dual reel cartridge, similar to Sony's 8 mm videotape products and Exabyte's 8 mm data tape products.
* SAIT – 1/2", single reel cartridge, similar to [[Digital Linear Tape|DLT]] and [[Linear Tape-Open|LTO]].
In March 2010, Sony announced the discontinuation of the AIT product line, and renewed collaboration with [[Hewlett-Packard]] on further development of the [[
== Compatibility ==
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| 12
|-
| Encoding
|Tape Length (m)▼
|
| ▼
| 170, 230▼
|
| Trellis-coding for Partial Response (TCPR)
| 170, 230▼
|
|-
| RPM
|Tape Thickness (µm)▼
▲|
|▼
|
| 4800
|
| 6400
|
|-
▲|Tape Length (m)
| 98
▲| 170, 230
| 186
▲| 170, 230
| 186
|-
| 6.6
| 7.0, 5.3
| 6.6
| 7.0, 5.3
| 6.6
|}
=== AIT-1 ===
* Original specification's data capacity
* Extended length tape, introduced in 1999 gave additional capacity, 35 GB.
* Speed increased to 4 MB/s in 2001.
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* Doubled capacity and transfer speed
* [[Write Once Read Many|WORM]] technology introduced
* Turbo variant is
* Turbo variant introduced R-MIC technology
* SATA version of AIT-2 Turbo available in 2006
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| 2005
| 2006
| ''
|-
| Native Capacity (GB)
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| 24
|
|-
| Encoding
▲|
|▼
| Extended TC-PRML
| Turbo-coded modulation
| ''Turbo-coded modulation''
|-
|Tape Length (m)
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|
|-
|Tape Thickness (
| 5.3
▲|
|▼
▲|
|
| 4.8
| 4.8
|
|-
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| YES
| YES
▲|
|}
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=== AIT-5 ===
* Available September 27, 2006<ref>{{cite press release |url=http://www.sony-europe.com/res/attachment/file/79/1159199085479.pdf |title=Sony announces availability of its fifth generation tape drive and media in celebrating 10 years of AIT |publisher=Sony |format=PDF |date=September 27, 2006 |accessdate=2007-10-15| archiveurl= https://web.archive.org/web/20070928123755/http://www.sony-europe.com/res/attachment/file/79/1159199085479.pdf| archivedate= 28 September 2007 | url-status= live}}</ref>
* Announced July 2006, hardware and media expected "in the fall."
* Doubled capacity (via halved tracked pitch to 2.2 μm), maintained transfer speed.
* Backwards compatible with AIT-3, AIT-3Ex, AIT-4
* New tape formulation, AME-3, which uses finer Cobalt particles resulting in SNR gain of 1 dB compared with AIT-4/AME-2.
* A switch to [[Giant magnetoresistance|GMR head]] technology (Flux Guide GMR).
== SAIT generations ==
[[File:Supertape data storage capacities.svg|thumb|500px|Comparison of "supertape" capacities, including SAIT.]]
{| class="wikitable" style="
! Generation
! SAIT-1
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| 2003
| 2006
| ''
| ''
|-
| Native Capacity (GB)
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|
|-
|Tape Thickness (
|
| 8.6
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=== SAIT-1 ===
* Highest capacity tape cartridge from 2003 to 2006. Displaced by DLT-S4 (800 GB).
The AIT format was developed and is controlled by Sony
=== SAIT-2 ===
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== Technical features ==
=== AME ===
=== MIC ===
Memory
=== R-MIC ===
Remote - Memory in Cassette
Like MIC except it
=== WORM ===
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==External links==
* [http://www.ecma-international.org/publications/standards/Ecma-246.htm ECMA 246] Specification of AIT-1. [http://www.ecma-international.org/publications/files/ecma-st/ECMA-246.pdf]
* [http://www.ecma-international.org/publications/standards/Ecma-291.htm ECMA 291] Specification of AIT-1 w/ MIC. [http://www.ecma-international.org/publications/files/ecma-st/ECMA-291.pdf]
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[[Category:Computer storage tape media]]
[[Category:Ecma standards]]
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