7 General

7.1Introduction

This specification describes the host interface of HDS7210xxCLA3yz / HUA7220xxCLA33z / HCS5C10xxCLA382 / HCS7210xxCLA3y2 / HDS5C10xxCLA382

.

The interface conforms to the following working documents of Information technology with certain limitations described in the chapter 0 “Deviations from Standard” on page 47

Serial ATA II: Extensions to Serial ATA Revision 2.6

7.2Terminology

Device

Device indicates HDS7210xxCLA3yz / HUA7220xxCLA33z /

HCS5C10xxCLA382 / HCS7210xxCLA3y2 / HDS5C10xxCLA382

 

Host

Host indicates the system that the device is attached to.

7.3Deviations From Standard

The device conforms to the referenced specifications, with deviations described below.

Check Power Mode

Check Power Mode command returns FFh to Sector Count Register when the

 

device is in Idle mode. This command does not support 80h as the return value.

COMRESET

COMRESET response is not the same as that of Power On Reset. Refer to

 

section 5.1, “Reset Response” for detail.

Download

COMRESET response time

Streaming Commands

Download command is aborted when the device is in security locked mode. During 500ms from Power On Reset, COMINIT is not returned within 10ms as a response to COMRESET.

When the device is in standby mode, Streaming Commands can‟t be completed while waiting for the spindle to reach operating speed even if execution time exceeds specified CCTL(Command Completion Time Limit). The minimum CCTL is 50ms.CCTL is set to 50ms when the specified value is shorter than 50ms. For HCS7210xxCLA3y2 and HCS5C10xxCLA382, the minimum CCTL is 100ms.

Error Recover Control When the device is in standby mode, any command where error recovery time

(SCT Command set) limit is specified can‟t be completed while waiting for the spindle to reach operating speed even if execution time exceeds specified recovery time limit. The minimum time limit is 6.5 second. When the specified time limit is shorter than 6.5 second, the issued command is aborted. For HCS7210xxCLA3y2 and HCS5C10xxCLA382, the minimum time limit is 0.3 second.

Hitachi hard disk drive specifications

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Hitachi HCS721032CLA382, HCS721050CLA382, HCS721025CLA382 Terminology, Deviations From Standard, Device, Check Power Mode

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.