1 base casting assembly, 2 dc motor assembly, 3 disk stack assemblies – Maxtor D540X-4K User Manual
Page 51: Table 5-1 cylinder contents, Table 5-1, Cylinder contents -3, Cylinder contents -4

Basic Principles of Operation
Maxtor D540X-4K 20.4/40.0/60.0/80.0 GB AT
5-3
$CUG %CUVKPI #UUGODN[
A single-piece, e-coated, aluminum-alloy base casting provides a mounting surface for
the drive mechanism and PCB. The base casting also acts as the flange for the DC
motor assembly. To provide a contamination-free environment for the HDA, a gasket
provides a seal between the base casting, and the metal cover that encloses the drive
mechanism.
&% /QVQT #UUGODN[
Integral with the base casting, the DC motor assembly is a fixed-shaft, brushless DC
spindle motor that drives the counter-clockwise rotation of the disks.
&KUM 5VCEM #UUGODNKGU
The disk stack assembly in the Maxtor D540X-4K hard disk drives consist of disks
secured by a disk clamp. The aluminum-alloy disks have a sputtered thin-film
magnetic coating.
A carbon overcoat lubricates the disk surface. This prevents head and media wear due
to head contact with the disk surface during head takeoff and landing. Head contact
with the disk surface occurs only in the landing zone outside of the data area, when
the disk is not rotating at full speed. The landing zone is located at the inner diameter
of the disk, beyond the last cylinder of the data area.
1. For user data, zone 15 is the innermost zone and zone 1 is the outermost zone.
6CDNG Cylinder Contents
%;.+0&'4
%106'065
<10'
1
07/$'4 1(
64#%-5
5'%6145
2'4 64#%-
# 4#6'
/D5
15
3562
487
251.01
14
3680
525
269.23
13
3680
560
286.54
12
3680
600
298.64
11
3680
633
325.44
10
3680
671
346.15
9
3680
709
365.38
8
3680
742
384.62
7
3680
800
403.85
6
3680
805
417.58
5
3680
836
432.69
4
3680
857
445.05
3
3680
883
459.13
2
3680
907
472.85
1
3680
925
481.78
System Data
0
60
400
197.44
$CUG %CUVKPI #UUGODN[
A single-piece, e-coated, aluminum-alloy base casting provides a mounting surface for
the drive mechanism and PCB. The base casting also acts as the flange for the DC
motor assembly. To provide a contamination-free environment for the HDA, a gasket
provides a seal between the base casting, and the metal cover that encloses the drive
mechanism.
&% /QVQT #UUGODN[
Integral with the base casting, the DC motor assembly is a fixed-shaft, brushless DC
spindle motor that drives the counter-clockwise rotation of the disks.
&KUM 5VCEM #UUGODNKGU
The disk stack assembly in the Maxtor D540X-4K hard disk drives consist of disks
secured by a disk clamp. The aluminum-alloy disks have a sputtered thin-film
magnetic coating.
A carbon overcoat lubricates the disk surface. This prevents head and media wear due
to head contact with the disk surface during head takeoff and landing. Head contact
with the disk surface occurs only in the landing zone outside of the data area, when
the disk is not rotating at full speed. The landing zone is located at the inner diameter
of the disk, beyond the last cylinder of the data area.
1. For user data, zone 15 is the innermost zone and zone 1 is the outermost zone.
6CDNG Cylinder Contents
%;.+0&'4
%106'065
<10'
1
07/$'4 1(
64#%-5
5'%6145
2'4 64#%-
# 4#6'
/D5
15
3462
486
243.59
14
3680
520
260.18
13
3680
560
280.54
12
3680
600
291.86
11
3680
628
315.93
10
3680
666
332.69
9
3680
700
348.08
8
3680
738
372.47
7
3680
771
389.42
6
3680
804
408.12
5
3680
836
423.08
4
3680
860
437.50
3
3680
900
452.66
2
3680
920
467.31
1
3680
950
481.78
System Data
0
60
400
269.23