Seagate STT20000N, Руководство по эксплуатации продукта

Страница: 7 / 70

Table of Contents
STT20000N Product Manual Page vii
Tape format 45
Introduction........................................................................................................... 45
Tape partitioning ................................................................................................... 45
Track positions ..................................................................................................... 45
Track numbering................................................................................................... 46
Track format ......................................................................................................... 46
Frames........................................................................................................... 46
Blocks ............................................................................................................ 48
Tape reference servo pattern ................................................................................ 48
Write equalization ................................................................................................. 49
Randomization...................................................................................................... 49
Theory of operations 51
Overview .............................................................................................................. 51
Drive configurations .............................................................................................. 51
Block diagrams ..................................................................................................... 51
Mechanics ............................................................................................................ 53
Cartridge load mechanism .............................................................................. 53
Capstan drive motor assembly........................................................................ 53
Chassis .......................................................................................................... 53
Control circuits ...................................................................................................... 53
Head design ......................................................................................................... 54
Flash EEPROM .................................................................................................... 54
Sensors and switches ........................................................................................... 54
Media (Travan minicartridges)............................................................................... 55
Read-While-Write ................................................................................................. 56
ALDC data compression ....................................................................................... 56
Glossary 57
Acronyms and units of measurement 60
Acronyms and abbreviations ................................................................................. 60
Units of measurement........................................................................................... 62