ANSI INCITS 203 : 1992

Foreword
1 Introduction
   1.1 Scope
   1.2 Purpose
   1.3 Conformance
2 Normative references
3 Definitions
4 Modulation and recording parameters
   4.1 Modulation
   4.2 Spacer signals
   4.3 Recording parameters
   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 data
   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 Header contents
   7.2 User Data Area
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 Item
   8.8 Pack Item location for data area
   8.9 Pack Item location for System Log
   8.10 Pack item location for Items 3 and 4 areas only
9 Group format definition
   9.1 Overall structure
   9.2 Data frames
   9.3 Index
   9.4 ECC frame
   9.5 Amble Frame
   9.6 Randomizing
   9.7 C1, C2, C3, Randomizing, Checksum, and Interleave
   9.8 Vendor group
   9.9 Indexing definition
10 Tape layout
   10.1 Single data space tape
   10.2 Two-Partition Tape
   10.3 Reference and System Area
   10.4 EOD, LEOT, and VEOT
   10.5 Repeated frames
   10.6 N-Group writing
   10.7 Appending
Annexes
A Measurement of bit shift
B Track leading edge linearity measurement
C Read-After-Write (RAW)
D Randomizer circuit
E Group example
F Vendor Group example

Contains the requirements for the helical-scan recording method and the Digital Data Storage (DDS) recorded format of a 3.81 mm (0.150 in.) magnetic tape cartridge to be used for information interchange between information processing systems.