K6610007
Rev.5
02.14.’03
- 20 -
4.2.2 Single HDD Test Condition
To optimize the performance, keep the following instructions.
1) For the Single HDD test, HDD should be placed on an ABS-sheet. HDD should be place with
no movement by external force min. 0.39N for X axis and Y-axis directions.
2) Don
’
t place HDD on a soft sponge sheet or hard surface at HDD test. If the HDD is placed on
then soft sponge sheet or slippery hard desk surface, the HDD has unstable conditions such as HDD
self-vibration at seek operations or spindle motor rotation. It may cause performance reduction or
some errors. Also, HDD floating by tension of I/F cabling may cause the similar symptom. The HDD
should be placed without any floating. Don
’
t test the HDD under these unstable conditions.
3) If the HDD cannot be fixed by the required holding torque above item 1), put a body weight on the
HDD as shown in Figure 4-3. The body weight is provided for preventing the HDD movement or HDD
floating by tension of I/F cabling.
Use
the
body weight as specified below.
Material : SS41 with ELP-coat
Weight : M=0.66kg
Inertia : I=7.3X10 kg m
Figure 4-3 Single HDD Test Condition
Y Axis Direction
X Axis Direction
(70)
(13)
(92)
Weight
SS41 with Insulation sheet
(m=0.66kg, I=7.3X10 kg m )
-4
2
HDD
ABS-sheet
(t = 5mm)
