Table 6: Full Stroke Seek Time; Table 7: Single Track Seek Time - Hitachi HTS542525K9SA00 Specifications

The terms "Typical" and "Max" are used throughout this document and are defined as follows:
Typical The 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. The seek time is measured from the start of the actuator's motion to the start of a reli-
able read or write operation. A reliable read or write implies that error correction or recovery is not
used to correct arrival problems. The average seek time is measured as the weighted average of all
possible seek combinations.
Weighted Average = ––––––––––––––––––––––––––––
where
max = Maximum seek length
n = Seek length (1 to max)
Tnin = Inward measured seek time for an n track seek
Tnout = Outward measured seek time for an n track seek
4.5.2.2 Full stroke seek time (without command overhead, including settling)

Table 6: Full stroke seek time

Function
Read
Write
Read (Quiet Seek mode)
Write (Quiet Seek mode)
Full stroke seek is measured as the average of 1,000 full stroke seeks with a random head switch from both direc-
tions (inward and outward).
4.5.2.3 Single track seek time (without command overhead, including settling)

Table 7: Single track seek time

Function
Read
Write
Read (Quiet Seek mode)
Write (Quiet Seek mode)
Single track seek is measured as the average of one (1) single track seek from every track in both directions
(inward and outward).
max
Σ (m10 n)(Tnin + Tnout)
n=1
(max + 1)(max)
Typical (ms)
15.1
16.1
32.5
33.5
Typical (ms) Max (ms)
0.8 1.5
1.3 2.0
0.8 1.5
1.3 2.0
Deskstar 7K160 Hard Disk Drive Specification
Max (ms)
18.1
19.1
35.5
36.5
16