6.3DC power requirements

Damage to the drive electronics may result if the power supply cable is connected or disconnected to the legacy Power connector while power is being applied to the drive (no hot plug/unplug is allowed). If SATA power supply cable is connected or disconnected to the SATA power connector, hot plug/unplug is allowed.

6.3.1Input voltage

Input voltage

During run and spin up

Absolute max

Supply rise time

spike voltage

 

 

 

 

 

 

 

+5 Volts Supply

5V ± 5%

–0.3 to 5.5V

0 to 5sec

+12 Volts Supply

12V ±10%

–0.3 to 15.0V

0 to 5sec

 

 

 

 

Table 17 Input voltage

Caution : To avoid damage to the drive electronics, power supply voltage spikes must not exceed specifications.

6.3.2Power supply current (typical)

Power supply current of

+5 Volts [mA]

+12 Volts [mA]

Total

 

2 Disk model

 

 

 

[W]

 

(values in milliamps. RMS)

Pop Mean

Pop Mean

 

 

 

Idle average

230

270

4.4

 

Idle ripple (peak-to-peak)

200

400

 

 

 

 

 

 

 

 

Low RPM idle

170

100

2.1

 

Low RPM idle ripple

100

250

 

 

 

 

 

 

 

 

Unload idle average

170

250

3.9

 

Unload idle ripple

100

300

 

 

 

 

 

 

 

 

Random R/W average1

330

560

8.4

 

 

 

(580) *1

 

 

 

(8.6) *1

 

 

 

 

 

Random R/W peak

1100

1700

 

 

 

Random R/W average(Quiet Seek)

350

330

5.7

 

Random R/W peak(Quiet Seek)

1100

1500

 

 

 

Start up (max)

1100

1800

 

 

Standby average

160

7

0.9

 

 

 

 

 

 

Sleep average

160

7

0.9

 

 

 

 

 

 

Table 18 Power supply current of 2 Disk model

*1 : for Ultrastar only

Except for a peak of less than 100 s duration

1Random R/W : 35 IOPS / 16 Blocks Random Write and Random Read

Hitachi hard disk drive specifications

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Hitachi HDS721075CLA332, HCS721050CLA382, A7K2000 DC power requirements, Input voltage, Power supply current typical

HCS721016CLA382, HCS721050CLA382, HCS721025CLA382, HDP725050GLA360, HUA722050CLA330/1 specifications

Hitachi's lineup of hard disk drives, including models such as HDS721075CLA632, HDS721032CLA362, HDS721032CLA662, HDS721050CLA362, and DSDS7210C09EN-04, offers a variety of features catering to different storage needs. These drives are widely recognized for their reliability, performance, and efficiency, making them suitable for both consumer and enterprise applications.

The HDS721075CLA632 model, with a capacity of 750GB, strikes a balance between performance and storage capabilities. It operates at 7200 RPM, ensuring quick access to data while maintaining low latency. Its 32MB cache enhances data transfer rates and improves overall system responsiveness. This HDD is particularly useful for gaming, multimedia, and office applications, allowing users to store a substantial amount of data with quick retrieval times.

The HDS721032CLA362 and HDS721032CLA662 share many similarities and are both designed for budget-conscious consumers. With a capacity of 320GB and a 7200 RPM, they offer efficient storage solutions for everyday tasks. The 32MB cache buffer enables efficient caching of frequently accessed files, providing a smooth experience for users.

Another notable model is the HDS721050CLA362, which features a capacity of 500GB. Like its counterparts, this drive operates at a speed of 7200 RPM and utilizes a 32MB cache, which ensures optimal performance for data-heavy applications. This model stands out for its energy efficiency, resulting in lower operational costs, making it an appealing choice for businesses and energy-conscious consumers alike.

On the other hand, the DSDS7210C09EN-04 is a part of Hitachi's enterprise-oriented offerings. This drive is engineered for demanding applications, featuring advanced technologies such as error recovery controls and enhanced data protection features. With a focus on reliability and performance, the DSDS7210C09EN-04 serves well in server environments and for high-performance computing.

Hitachi's hard drives incorporate various technologies that enhance their performance and durability. Features such as staggered start-up, which gradually powers on the drive, help minimize power surges and increase the longevity of the device. Moreover, Hitachi's commitment to quality ensures that each drive undergoes rigorous testing, guaranteeing functionality and reliability.

Overall, the diverse range of models from Hitachi provides effective solutions for anyone from casual users to enterprises, combining storage capacity with advanced technologies to meet the evolving demands of modern data storage.