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Hitachi HDS723020BLA642 manual Write Log Ext 3Fh, Write Log Ext Command

Models: HDS723020BLA642

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7K200 SATA OEM Specification

14.47Write Log Ext (3Fh)

Command Block Output Registers

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Command Block Input Registers

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Register

 

 

 

7

 

 

6

 

 

5

 

 

4

 

3

 

2

 

 

1

 

0

 

Register

 

 

 

7

 

 

 

6

 

5

 

 

 

4

3

 

 

 

2

 

1

 

 

 

0

 

 

 

 

 

-

 

-

 

-

 

-

 

 

-

 

-

 

-

 

 

 

 

 

 

 

 

-

 

-

 

-

 

-

-

 

-

 

-

 

-

Data Low

 

 

-

 

 

Data Low

 

 

 

 

 

 

 

 

 

-

 

-

 

-

 

-

 

-

-

 

-

 

-

 

 

 

 

 

 

 

 

-

 

-

 

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-

 

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Data High

 

 

 

 

Data High

 

 

 

 

Feature

 

 

Current

 

-

 

 

-

 

 

-

 

 

-

 

-

 

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-

 

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Error

 

 

 

 

 

 

 

 

 

 

 

...See Below...

 

 

 

 

 

 

 

 

 

Previous

 

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Sector Count

Current

 

V

 

 

 

V

 

 

V

 

 

V

 

V

 

 

V

 

 

V

 

V

 

Sector Count

 

HOB=0

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Previous

 

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V

 

 

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V

 

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V

 

 

V

 

V

 

 

 

 

 

 

 

HOB=1

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-

 

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-

LBA Low

Current

 

V

 

 

 

V

 

 

V

 

 

V

 

V

 

 

V

 

 

V

 

V

 

LBA Low

 

HOB=0

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Previous

 

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HOB=1

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LBA Mid

Current

 

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V

 

 

V

 

 

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V

 

 

V

 

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LBA Mid

 

HOB=0

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Previous

 

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V

 

 

V

 

 

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HOB=1

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LBA High

Current

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LBA High

 

HOB=0

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Previous

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HOB=1

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Device

 

 

 

 

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Device

 

 

 

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Command

 

 

 

0

 

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1

 

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Status

 

 

 

 

 

 

 

 

 

...See Below...

 

 

 

 

 

 

 

 

 

 

Error

Register

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Status Register

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7

 

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7

 

 

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2

 

1

 

 

0

CRC

 

UNC

 

0

IDN

0

 

 

 

ABT

 

 

T0N

 

 

AMN

 

BSY

 

 

RDY

 

DF

DSC

DRQ

 

COR

IDX

ERR

V

 

V

 

0

V

0

 

 

 

 

 

V

 

 

 

0

 

 

 

0

 

 

0

 

 

V

 

0

 

V

 

-

 

 

0

 

0

 

 

V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 131 Write Log Ext Command

This command writes a specified number of 512 byte data sectors to the specific log. The device shall interrupt for each DRQ block transferred.

Output Parameters To The Device

Sector Count Current The number of sectors to be written to the specified log low order, bits (7:0).

Sector Count Previous The number of sectors to be written to the specified log high orders, bits (15:8). If the number of sectors is greater than the number indicated in the Log directory, which is available in Log number zero, the device shall return command aborted. The log transferred to the device shall be stored by the device starting at the first sector in the specified log.

Sector Number Current The log to be written as described in Table 110 Log sector addresses definition. If the host attempts to write to a read only log address, the device shall return command aborted.

Cylinder Low Current The first sector of the log to be written low order, bits (7:0).

Cylinder Low Previous The first sector of the log to be written high order, bits (15:8)

If the feature set associated with the log specified in the Sector Number register is not supported or enabled, or if the values in the Sector Count, Sector Number or Cylinder Low registers are invalid, the device shall return command aborted. If the host attempts to write to a read only log address, the device shall return command aborted.

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Hitachi HDS723020BLA642 manual Write Log Ext 3Fh, Write Log Ext Command
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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.