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Hitachi HDS723020BLA642 Example for operation In LBA mode, Shipping HDDs from HDD manufacturer

Models: HDS723020BLA642

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7K200 SATA OEM Specification

Set Max Set Password

Set Max Lock

Set Max Freeze Lock

Set Max Unlock

12.10.1Example for operation (In LBA mode)

Assumptions :

For better understanding, the following example uses actual values for LBA, size, etc. Since it is just an example, these values could be different.

Device characteristics

 

 

 

Capacity (native)

:

536,870,912

byte (536MB)

Max LBA (native)

:

1,048,575

(0FFFFFh)

Required size for protected area

:

8,388,608

byte

Required blocks for protected area

:

16,384

(004000h)

Customer usable device size

:

528,482,304

byte (528MB)

Customer usable sector count

:

1,032,192

(0FC000h)

LBA range for protected area

: 0FC000h to 0FFFFFh

Shipping HDDs from HDD manufacturer

 

 

 

When the HDDs are shipped from HDD manufacturer, the device has been tested to have a capacity of 536MB,flagging the media defects not to be visible by system.

1.Preparing HDDs at system manufacturer

Special utility software is required to define the size of protected area and store the data into it.

The sequence is :

Issue Read Native Max Address command to get the real device max of LBA/CYL. Returned value shows that native device Max LBA is 0FFFFFh regardless to the current setting.

Make entire device be accessible including the protected area by setting device Max LBA as 0FFFFFh via Set Max Address command. The option could be either nonvolatile or volatile.

Test the sectors for protected area (LBA >= 0FC000h) if required.

Write information data such as BIOS code within the protected area.

Change maximum LBA using Set Max Address command to 0FBFFFh with nonvolatile option.

From this point, the protected area cannot be accessed until next Set Max Address command is issued. Any BIOSes, device drivers, or application software access the HDD as if that is the 528MB device because the device acts exactly same as real 528MB device does.

2.Conventional usage without system software support

Since the HDD works as 528MB device, there is no special care to use this device for normal use.

3.Advanced usage using protected area

The data in the protected area is accessed by following.

Issue Read Native Max Address command to get the real device max LBA/CYL. Returned value shows that native device Max LBA is 0FFFFFh regardless of the current setting.

Make entire device be accessible including the protected area by setting device Max LBA as 0FFFFFh via Set Max Address command with volatile option. By using this option, unexpected power removal or reset will not make the protected area remained accessible.

Read information data from protected area.

Issue POR to inhibit any access to the protected area.

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Hitachi HDS723020BLA642 manual Example for operation In LBA mode, Shipping HDDs from HDD manufacturer
Page 63 Page 65

HDS723020BLA642 specifications

The Hitachi HDS723020BLA642 is a high-performance hard disk drive that exemplifies the balance between reliability and advanced technology, making it an excellent choice for a range of applications, from desktop computers to enterprise storage solutions. This 2TB SATA hard drive is designed to meet the growing data storage needs of users who demand both speed and efficiency.

One of the key features of the HDS723020BLA642 is its impressive rotational speed of 7200 RPM. This speed facilitates faster data access and improved overall performance, significantly enhancing the user experience during data-intensive operations such as gaming, video editing, and large file transfers. Coupled with a SATA III interface, this drive facilitates data transfer rates of up to 6 Gb/s, providing an efficient conduit for moving data quickly between the hard drive and the motherboard.

The drive comes equipped with a large 64 MB cache, which plays a crucial role in buffering read and write operations. This substantial amount of cache memory allows the drive to temporarily store frequently accessed data, leading to reduced latency and enabling smoother multitasking capabilities. Users will benefit from faster load times and reduced wait periods when working with large files.

Reliability is another defining characteristic of the HDS723020BLA642. Hitachi, now a part of Western Digital, has a longstanding reputation for producing durable hard drives. This model incorporates advanced technologies, such as the Fluid Dynamic Bearing (FDB) for quieter operation and better longevity. The drive also features an enhanced error recovery system that minimizes the risk of data loss, making it a suitable option for both personal and professional use.

In terms of power efficiency, the HDS723020BLA642 is designed to consume less power during operation compared to older hard drive models. This efficiency not only helps in reducing operational costs but also contributes to a longer lifespan for the drive itself.

Overall, the Hitachi HDS723020BLA642 hard drive combines speed, reliability, and efficiency into a compact package, making it an ideal choice for users needing a substantial amount of storage without compromising on performance. Whether for upgrading an existing system or building a new one, this drive offers a blend of technology and durability that caters to modern storage demands.