ANSI INCITS 205 : 1992 : R2002

Foreword
1 Introduction
   1.1 Scope
   1.2 Purpose
   1.3 Conformance
2 Normative references
3 Definitions
   3.1 Absolute Frame Number
   3.2 Area code
   3.3 Automatic track finding (ATF)
   3.4 Average signal amplitude
   3.5 Bit
   3.6 Byte
   3.7 Channel bit
   3.8 Character
   3.9 Data format ID
   3.10 Dropout
   3.11 End of data (EOD)
   3.12 End of information (EOI)
   3.13 End of partition (EOP)
   3.14 Error-correcting code (ECC)
   3.15 File Mark
   3.16 Frame
   3.17 Fundamental frequency
   3.18 Group
   3.19 Header
   3.20 Logical beginning of tape (LBOT)
   3.21 Magnetic tape
   3.22 Master Reference
   3.23 Master standard amplitude calibration tape
   3.24 Master standard reference tape
   3.25 Partition
   3.26 Partition Reference
   3.27 Physical beginning of tape (PBOT)
   3.28 Physical recording density
   3.29 Record
   3.30 Reserved
   3.31 Save-Set Mark
   3.32 Search Mark
   3.33 Secondary standard amplitude calibration tape
   3.34 Secondary standard reference tape
   3.35 Standard reference amplitude
   3.36 Symbol
   3.37 Tape reference edge
   3.38 Track
   3.39 Transition-line azimuth
4 Modulation and recording parameters
   4.1 Modulation
   4.2 Spacer signals
   4.3 Recording parameter
   4.4 Bit-cell length
   4.5 Bit shift
5 Track configuration and patterns
   5.1 Track configuration
   5.2 Signal allocation
   5.3 Tracking scheme
6 Main data area configuration
   6.1 Synchronization pattern
   6.2 Main ID
   6.3 Main ID parity
   6.4 Main data
   6.5 Error correction and detection code (C1, C2)
7 Main data layout
   7.1 Data symbol map
   7.2 Interleave format
8 Sub area
   8.1 Synchronization pattern
   8.2 Sub ID
   8.3 Sub ID parity
   8.4 Sub data
   8.5 Sub data configuration
   8.6 Error correction and detection code (SP)
   8.7 Pack items
9 Group format definition
   9.1 Group Format 0
   9.2 Group Format 1
   9.3 Extended gap frames
   9.4 Types of groups
   9.5 Data layout of a group
   9.6 Group ID
   9.7 Record ID list
   9.8 Record ID
   9.9 Heuristic recovery data area
10 Tape layout
   10.1 Load/unload area
   10.2 Lead-in area
   10.3 Partition
   10.4 EOI
   10.5 Group relocation
   10.6 Repeated groups
   10.7 Repeated frames
   10.8 Appending
   10.9 Overwrite
Annexes
A Measurement of bit shift
B Track leading edge linearity measurement
C Read-After-Write (RAW)
D Examples of mark usage
E Total overview

Gives the requirements for the Helical-Scan recording method and DATA/DAT recorded format of a 3.81 mm (0.150 in.) magnetic tape cartridge used for information interchange between information processing systems.