Maxtor D740X-6L 20.0 AT Product Manual page 52

B a s i c P r i n c i p l e s o f O p e r a t i o n
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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.
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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.
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The disk stack assembly in the Maxtor D740X-6L 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.
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S y s t e m D a t a
1. For user data, zone 15 is the innermost zone and zone 1 is the outermost zone.
5 - 3 M a x t o r D 7 4 0 X - 6 L 2 0 . 0 / 4 0 . 0 / 6 0 . 0 / 8 0 . 0 G B A T
6 C D N G  
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1
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6 4 # % - 5
0 6 8
1 2 5 8 2
2 4 4 1 2
3 4 1 2 3
4 3 5 3 9
5 4 0 6 8
6 4 3 8 0
7 4 3 8 8
8 5 0 2 2
9 5 1 9 0
1 0 4 4 0 6
1 1 3 3 3 2
1 2 3 9 8 5
1 3 2 9 3 3
1 4 2 9 1 4
1 5 3 6 9 6
C y l i n d e r C o n t e n t s
5 ' % 6 1 4 5
2 ' 4 6 4 # % -
2 9 9
8 3 7
8 2 6
8 1 4
8 0 5
7 8 9
7 8 4
7 4 4
7 0 0
6 5 8
6 1 6
5 8 8
5 4 8
5 2 2
4 9 0
4 5 7
& # 6 # 4 # 6 '
4 6 9 . 2 3
5 5 1 . 2 8
5 4 3 . 5 9
5 3 6 . 2 0
5 3 0 . 2 2
5 2 0 . 5 1
5 0 9 . 6 2
4 8 9 . 8 8
4 6 1 . 5 4
4 3 4 . 6 2
4 0 7 . 0 5
3 8 7 . 9 6
3 6 0 . 9 5
3 4 4 . 6 2
3 2 3 . 5 3
3 0 4 . 2 0