Typical Max.

Travelstar 5K160 (SATA) Hard Disk Drive Specification

4.4.2Mechanical positioning

4.4.2.1 Average seek time (including settling)

Command Type

Typical (ms)

Max. (ms)

Read

11

14

Write

13

15

Table 5. Mechanical positioning performance

Typical and Max. are defined throughout the performance specification as follows:

Average of the drive population tested at nominal environmental and voltage conditions. Maximum value measured on any one drive over the full range of the environmental and voltage conditions. (See section 6.1, "Environment" on page 23 and section 6.2, "DC power requirements" on page 25)

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.

max.

Σ (max. + 1 – n)(Tnin + Tnout)

n=1

Weighted Average = ––––––––––––––––––––––––––––

(max. + 1)(max)

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

4.4.2.2Full stroke seek

Command Type

Typical (ms)

Max. (ms)

Read

20.0

25.0

Write

21.0

26.0

Table 6. Full stroke seek time

Full stroke seek time in milliseconds is the average time of 1000 full stroke seeks.

4.4.2.3Single track seek time (without command overhead, including settling)

Command Type

Typical (ms)

Maximum (ms)

Read

1.0

2.0

Write

1.1

2.2

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).

4.4.2.4Average latency

Rotational Speed

Time for one revolution

Average Latency

(RPM)

(ms)

(ms)

5400

11.1

5.5

Table 8. Latency time

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Hitachi HTS541612J9SA00 Mechanical positioning, Average seek time including settling, Full stroke seek, Average latency
Page 18 Page 20

HTS541640J9SA00, HTS541616J9SA00, HTS541680J9SA00, HTS541612J9SA00, HTS541660J9SA00 specifications

The Hitachi HTS541660J9SA00, HTS541640J9SA00, HTS541616J9SA00, HTS541680J9SA00, and HTS541612J9SA00 are a series of hard disk drives that showcase Hitachi's commitment to high-performance storage solutions. These drives belong to the Travelstar series, which is designed primarily for mobile computing applications, such as laptops and external storage devices. Their compact design and reliable performance make them suitable for users seeking efficient storage in portable settings.

One of the primary features of these drives is their SATA interface, which allows for fast data transfer rates, thereby enhancing overall system performance. The SATA II interface provides a maximum transfer rate of up to 3.0 Gbps, ensuring that these drives can keep up with the demands of modern computing.

The storage capacity of these models varies, with options such as 160GB, 250GB, and 320GB, catering to diverse user needs for both personal and professional use. The HTS541660J9SA00 provides a generous 160GB capacity, while the HTS541680J9SA00 offers up to 320GB, making them suitable for users who require significant storage space for media files, applications, and documents.

In terms of performance, these hard drives boast a rotational speed of 5400 RPM, striking an optimal balance between speed and energy efficiency. This speed ensures relatively quick access times while consuming less power compared to faster 7200 RPM drives, making them ideal for battery-powered devices.

Another significant characteristic of these drives is the use of Hitachi’s Advanced Format technology. This technology increases the physical sector size of the drives to 4KB, enhancing error correction and overall data integrity. This larger sector size allows for greater data efficiency, significantly reducing the overhead associated with data storage.

Furthermore, these drives are designed with Shock Protection technology, which helps to safeguard the drive's internal components from physical shocks caused by accidental drops or bumps. This feature is especially important for mobile storage solutions, where portability can lead to unintentional impacts.

In conclusion, the Hitachi HTS541660J9SA00, HTS541640J9SA00, HTS541616J9SA00, HTS541680J9SA00, and HTS541612J9SA00 hard disk drives are exemplary choices for anyone seeking reliable, efficient, and portable storage solutions. With their combination of adequate capacity, enhanced data management technologies, and robust design, these drives effectively meet the demands of today’s mobile computing needs.
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