4.5.4 Operating modes

4.5.4.1Operating mode descriptions

Operating mode

Description

 

Spin-up

Start up time period from spindle stop or power down

 

Seek

Seek operation mode

 

Write

Write operation mode

 

Read

Read operation mode

 

Unload Idle

Spindle rotation at 7200 RPM with heads unloaded

 

Idle

Spindle motor and servo system are working normally. Commands can be received

 

and processed immediately

 

Standby

Actuator is unloaded and spindle motor is stopped.

Commands can be received

 

immediately

 

Sleep

Actuator is unloaded and spindle motor is stopped.

Only soft reset or COMRESET can

 

change the mode to standby

 

Note: Upon power down or spindle stop a head locking mechanism will secure the heads in the OD parking position.

4.5.4.2Mode transition times

Mode transition times are shown below.

From

To

RPM

Typical Transition

Max Transition

 

time(sec)

time(sec)

 

 

 

 

 

 

 

 

 

Standby

Idle

0 -> 7200

8 (1Disk model)

20

10

(2Disk model))

 

 

 

 

 

 

 

 

 

 

Idle

Standby

7200 -> 0

 

Immediately

20

 

 

 

 

 

 

Standby

Sleep

0

 

Immediately

Immediately

 

 

 

 

 

 

Sleep

Standby

0

 

Immediately

Immediately

 

 

 

 

 

 

Unload idle

Idle

7,200

 

0.7

1

 

 

 

 

 

 

Idle

Unload Idle

7,200

 

0.7

1

 

 

 

 

 

 

Low RPM Idle

Idle

4500 -> 7200

3

(1 Disk model)

10

4

(2 Disk model)

 

 

 

 

 

 

 

 

 

 

Note: The command is processed immediately but there will be an actual spin down time reflecting the seconds passed until the spindle motor stops.

Note: Low rpm idle mode is supported on specific drive PN, only.

Table 13 Mode transition times

- Hitachi hard disk drive specifications –

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Hitachi 7K1000C, HCS721050CLA382, HCS721032CLA382 Operating modes, Operating mode descriptions, Mode transition times

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.

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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.

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