Table 5. Mechanical Positioning Performance; Table 6. Full Stroke Seek Time; Table 7. Single Track Seek Time; Table 8. Latency Time - Hitachi HTS541616J9AT00 - Travelstar 160 GB Hard Drive Specifications

2.5 inch ata/ide hard disk drive
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Mechanical positioning
4.4.1.1
Average seek time (including settling)
Command Type
Read
Write

Table 5. Mechanical positioning performance

Typical and Max. are defined throughout the performance specification as follows:
Typical
Average of the drive population tested at nominal environmental and voltage conditions.
Max.
Maximum value measured on any one drive over the full range of the environmental and
voltage conditions. (See section 6.1 "Environment" and 6.2 "DC power requirements" on
page 24)
The seek time is measured from the start of motion of the actuator to the start of a reliable read or write operation. A
reliable read or write operation implies that error correction/recovery is not employed to correct arrival problems.
The Average Seek Time is measured as the weighted average of all possible seek combinations.
Weighted
Average
Where:
max.
n
Tnin
Tnout
4.4.1.2
Full stroke seek
Command Type
Read
Write

Table 6. Full stroke seek time

Full stroke seek time in milliseconds is the average time of 1000 full stroke seeks.
4.4.1.3
Single track seek time (without command overhead, including settling)
Command Type
Read
Write

Table 7. Single track seek time

Single track seek is measured as the average of one (1) single track seek from every track in both directions (inward
and outward).
4.4.1.4
Average latency
Rotational Speed (RPM)
5400

Table 8. Latency time

Travelstar 5K160 (PATA) Hard Disk Drive Specification
Typical (ms)
11
13
max
+
(max
1
n
)(
Tnin
=
=
n
1
+
(max
1
)(max)
= maximum seek length
= seek length (1-to-max.)
= inward measured seek time for an n-track seek
= outward measured seek time for an n-track seek
Typical (ms)
20.0
21.0
Typical (ms)
1.0
1.1
Time for one revolution (ms)
11.1
Max. (ms)
14
15
+
Tnout
)
Max. (ms)
25.0
26.0
Maximum (ms)
2.0
2.2
Average Latency
(ms)
5.5
18 / 188

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