ANSI INCITS 91M : 1987

1 Scope
2 Definitions
3 Physical Characteristics
  3.1 Cabling Configuration
  3.2 Connector Characteristics
  3.3 Cable Characteristics
  3.4 Electrical Characteristics
4 Signal Definitions
  4.1 CONTROL Cable Interface
  4.2 READ/WRITE Cable Interface
5 Timing Characteristics
  5.1 Device Selection Sequence
  5.2 SEEK Command Sequence
  5.3 REZERO Command Sequence
  5.4 OFFSET Command Sequence
  5.5 HEAD SET Command Sequence
  5.6 FAULT CLEAR Command Sequence
  5.7 INDEX MARK and SECTOR MARK Timing
  5.8 READ Command Sequence
  5.9 WRITE Command Sequence
  5.10 READ ADDRESS MARK Command Sequence
  5.11 WRITE ADDRESS MARK Command Sequence
  5.12 SERVO CLOCK
  5.13 READ CLOCK and READ DATA
  5.14 WRITE CLOCK and WRITE DATA
6 Interface Extensions
  6.1 Extended Functions
  6.2 Dual Port
  6.3 Spinup Sequencing
  6.4 TAG 4
  6.5 TAG 5
  6.6 TAG 6
  6.7 INDEX MARK and SECTOR MARK
  6.8 Fixed-Head Addressing
  6.9 Service Voltages on Round Radial Cable
  6.10 Extended Cylinder Addressing
Tables
Figures

Gives functional, electrical and mechanical requirements for the storage module class of interface between disk drives and their control units.