Datasheet

Hitachi Global Storage Technologies
Page 5 version 1.1
Operating modes
To provide the greatest flexibility of
operation with optimum perfor-
mance and power consumption, the
drive has a number of operating
modes. These are defined below.
Spin Up
Start up time period from spindle
stop or power down.
Seek
Seek operation mode
Write
Write operation mode
Read
Read operation mode
Performance idle
The device is capable of respond-
ing immediately to media access re-
quests. All electronic components
remain powered and full frequency
servo remains operational.
Low Power idle
Spindle motor is rotating normally
with actuator unloaded to the park-
ing positions.
Standby
The device interface is capable of
accepting commands. Spindle mo-
tor is stopped. All circuitry except
host interface is in power saving
mode. The execution of commands
is delayed until spindle becomes
ready.
Electromagnetic compatibility
When installed in a suitable enclo-
sure and exercised with a random
accessing routine at the maximum
data rate, the drive meets the
following worldwide EMC require-
ments:
 United States Federal
Communications Commission
(FCC) Rules and Regulations
(Class B), Part 15
 This drive is certified for
compliance to EC directive
89/336/EEC
 C-Tick Mark complies with
Australian EMC standard,
AS/NZS 3548:1995 Class B
 The drive complies with Taiwan
BSMI EMC standard
Physical dimensions
Height (mm) 26.1
Width (mm) 101.6±0.25
Length (mm) 147.0±0.6
Weight (grams max) .75
Refer to the illustration below.
Mounting
The drive will operate in all axes
(six directions). To avoid perfor-
mance degradation the drive must
be mounted securely in the system.
Drive level vibration tests and shock
tests are to be conducted with the
drive mounted to the table using the
bottom four screws.
Refer to the illustration on the next
page for mounting positions and
tappings.