Quantum FIREBALL PLUS AS 10.2 - Page 4

Table of Contents
iv Quantum Fireball Plus AS 10.2/20.5/30.0/40.0/60.0 GB AT
3.9.2 The 8.4-Gigabytes Barrier .................................................................................3-16
3.9.3 Operating system limitations ............................................................................3-16
3.10 SYSTEM STARTUP AND OPERATION................................................................. 3-17
Chapter 4
SPECIFICATIONS
4.1 SPECIFICATION SUMMARY ................................................................................... 4-1
4.2 FORMATTED CAPACITY.......................................................................................... 4-3
4.3 DATA TRANSFER RATES......................................................................................... 4-3
4.4 TIMING SPECIFICATIONS ...................................................................................... 4-4
4.5 POWER........................................................................................................................ 4-5
4.5.1 Power Sequencing ..............................................................................................4-5
4.5.2 Power Reset Limits .............................................................................................4-5
4.5.3 Power Requirements ...........................................................................................4-6
4.6 ACOUSTICS................................................................................................................ 4-7
4.7 MECHANICAL ........................................................................................................... 4-8
4.8 ENVIRONMENTAL CONDITIONS.......................................................................... 4-8
4.9 SHOCK AND VIBRATION........................................................................................ 4-9
4.10 HANDLING the DRIVE ........................................................................................... 4-10
4.11 RELIABILITY............................................................................................................ 4-10
4.12 ELECTROMAGNETIC SUSCEPTIBILITY.............................................................. 4-11
4.13 SPINDLE IMBALANCE........................................................................................... 4-11
4.14 DISK ERRORS.......................................................................................................... 4-11
Chapter 5
BASIC PRINCIPLES OF OPERATION
5.1 Quantum Fireball Plus AS DRIVE MECHANISM..................................................... 5-1
5.1.1 Base Casting Assembly .......................................................................................5-3
5.1.2 DC Motor Assembly ...........................................................................................5-3
5.1.3 Disk Stack Assemblies ........................................................................................5-3
5.1.4 Headstack Assembly ...........................................................................................5-4
5.1.5 Rotary Positioner Assembly ................................................................................5-4
5.1.6 Automatic Actuator Lock ...................................................................................5-4
5.1.7 Air Filtration .......................................................................................................5-5
5.2 DRIVE ELECTRONICS.............................................................................................. 5-5
5.2.1 Integrated µProcessor, Disk Controller and ATA Interface Electronics ............5-6
5.2.2 Read/Write ASIC ................................................................................................5-8
5.2.3 PreAmplifier and Write Driver .........................................................................5-10
5.3 FIRMWARE FEATURES .......................................................................................... 5-10
5.3.1 Disk Caching .....................................................................................................5-10
5.3.2 Head and Cylinder Skewing .............................................................................5-12
5.3.3 Error Detection and Correction ........................................................................5-13
5.3.4 Defect Management ..........................................................................................5-15