Hitachi DK23FB-60 Owners Manual - Page 20
Single HDD Test Condition
UPC - 706569123807
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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. (70) (13) Use the body weight as specified below. Material : SS41 with ELP-coat Weight : M=0.66kg (92) Inertia : I=7.3X10 kg m Y Axis Direction Weight SS41 with Insulation sheet (m=0.66kg, I=7.3X10-4 kg m2 ) HDD X Axis Direction K6610007 Rev.5 02.14.'03 ABS-sheet (t = 5mm) Figure 4-3 Single HDD Test Condition - 20 -