Hitachi HDS721025CLA382, HCS721050CLA382, HCS721032CLA382, A7K2000

Output Parameters To The Device
Feature Current	bit 7	(A/R)	If set to one, a request to add a new stream.
			If cleared to zero, a request to remove a previous configured
			stream is specified.
Feature Current	bit 6	(R/W)	R/W specifies a read stream if cleared to zero and a write stream
			if set to one.

Feature Current bit 0..2 (Stream ID) Feature Previous

The Stream ID shall be a value between 0 and 7.

The default Command Completion Time Limit (CCTL). The value is calculated as follows:

(Default CCTL) = ((content of the Features register)* (Identify Device words (99:98))) micriseconds.

This time shall be used by the device when a streaming command with the same stream ID and a CCTL of zero are issued. The time is measured from the write of the command

register to the final INTRQ for command completion. The device has minimum CCTL value. When the specified value is shorter than the minimum value, CCTL is set to the minimum value. Actual minimum CCTL value is described in the “Deviations from Standard” section.

Sector Count Current	Allocation Unit Size In Sectors (7:0)
Sector Count Previous	Allocation Unit Size In Sectors (15:8)

Hitachi hard disk drive specifications

109 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.