Base Casting Assembly; Dc Motor Assembly; Disk Stack Assemblies; Table 5-1 Cylinder Contents - Quantum FIREBALL PLUS AS 10.2 Product Manual

Basic Principles of Operation
5.1.1 5.1.1 5.1.1 5.1.1

Base Casting Assembly

Base Casting Assembly Base Casting Assembly Base Casting Assembly
A single-piece, e-coated, aluminum-alloy base casting provides a mounting surface
for the drive mechanism and PCB. The base casting also acts as the flange for the
DC motor assembly. To provide a contamination-free environment for the HDA, a
gasket provides a seal between the base casting, and the metal cover that encloses
the drive mechanism.
5.1.2 5.1.2

DC Motor Assembly

DC Motor Assembly
5.1.2 5.1.2 DC Motor Assembly DC Motor Assembly
Integral with the base casting, the DC motor assembly is a fixed-shaft, brushless DC
spindle motor that drives the counter-clockwise rotation of the disks.
5.1.3 5.1.3 5.1.3 5.1.3

Disk Stack Assemblies

Disk Stack Assemblies Disk Stack Assemblies Disk Stack Assemblies
The disk stack assembly in the Quantum Fireball Plus AS hard disk drives consist
of disks secured by a disk clamp. The aluminum-alloy disks have a sputtered thin-
film magnetic coating.
A carbon overcoat lubricates the disk surface. This prevents head and media wear
due to head contact with the disk surface during head takeoff and landing. Head
contact with the disk surface occurs only in the landing zone outside of the data
area, when the disk is not rotating at full speed. The landing zone is located at the
inner diameter of the disk, beyond the last cylinder of the data area.
CYLINDER CYLINDER
CYLINDER CYLINDER
CONTENTS CONTENTS
CONTENTS CONTENTS
System Data
1. For user data, zone 15 is the innermost zone and zone 1 is the outermost zone.
5-3 Quantum Fireball Plus AS 10.2/20.5/30.0/40.0/60.0 GB AT

Table 5-1 Cylinder Contents

Table 5-1
Table 5-1 Table 5-1
NUMBER NUMBER
NUMBER NUMBER
1
ZONE ZONE ZONE ZONE
OF TRACKS OF TRACKS
OF TRACKS OF TRACKS
0 65
1 2348
2 2342
3 2342
4 2342
5 2342
6 2342
7 2342
8 2342
9 2342
10 2342
11 2342
12 2342
13 2342
14 2342
15 2342
SECTORS SECTORS
SECTORS SECTORS
DATA RATE DATA RATE DATA RATE DATA RATE
PER TRACK PER TRACK
PER TRACK PER TRACK
345 302.0
694 490.0
690 486.7
676 476.9
666 466.7
651 456.7
636 446.7
616 433.3
598 420
592 406.2
551 387.7
522 365.7
493 344.0
453 317.7
419 292.5
375 262.5