Table 8: Latency Time; Table 9: Drive Ready Time; Table 10: Description Of Operating Modes - Hitachi HDT725025VLA380 - Deskstar 0A33423 T7K500 250GB SATA 7200RPM 8MB Cache Hard Drive Specifications

4.5.2.4 Average latency

Table 8: Latency Time

Rotational speed
(RPM)
7200 RPM
4.5.3 Drive ready time

Table 9: Drive ready time

Power on to ready
250-320 GB models
400/500 GB models
Ready
Power on
Note: Max Power On to ready time is the maximum time period that Device 0 waits for Device 1 to assert PDIAG.
4.5.4 Operating modes
4.5.4.1 Description of operating modes

Table 10: Description of operating modes

Operating mode
Spin-up
Seek
Write
Read
Unload Idle
Idle
Standby
Sleep
Note: Upon power down or spindle stop a head locking mechanism will secure the heads in the OD parking posi-
tion.
Time for one
revolution (ms)
8.3
Typical (sec)
10
14
The condition in which the drive is able to perform a media access command (for exam-
ple- read, write) immediately.
This includes the time required for the internal self diagnostics.
Description
Start up time period from spindle stop or power down.
Seek operation mode
Write operation mode
Read operation mode
Spindle rotation at 7200 RPM with heads unloaded.
Spindle motor and servo system are working normally. Commands can be received and pro-
cessed immediately.
Actuator is unloaded and spindle motor is stopped. Commands can be received immediately.
TActuator is unloaded and spindle motor is stopped. Only soft reset or hard reset can change
the mode to standby.
Deskstar T7K500 Hard Disk Drive Specification
Average latency
(ms)
4.17
Maximum (sec)
20
20
17