Hitachi HDS723020BLA642 14.39.4 S.M.A.R.T. Log Directory, 14.39.5 S.M.A.R.T. error log sector

Models: HDS723020BLA642

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7K200 SATA OEM Specification

Description

Attribute ID Number (01h to FFh)

Attribute Threshold (for comparison with Attribute Values from 00h to FFh)

Bytes

1

1

Offset

00h

01h

Format

binary

binary

00h -

always passingthreshold value to be

 

 

 

 

used for code test purposes

 

 

 

 

 

 

 

 

01h -

minimum value for normal operation

 

 

 

 

 

 

 

 

 

 

 

 

FDh -

maximum value for normal operation

 

 

 

 

 

 

 

 

 

 

 

 

FEh -

invalid for threshold value

 

 

 

 

 

 

 

 

 

 

 

 

FFh -

“always failing” threshold value to be used

 

 

 

for code test purposes

 

 

 

 

 

 

 

Reserved (00h)

 

10

02h

binary

Total Bytes

 

12

 

 

Table 115 Individual Threshold Data Structure

14.39.3.3Attribute ID Numbers

Attribute ID Numbers supported by the device are the same as Attribute Values Data Structures.

14.39.3.4Attribute Threshold

These values are preset at the factory and are not meant to be changeable. However, the host might use “ S.M.A.R.T. Write Attribute Threshold” subcommand to override these preset values in the Threshold sectors.

14.39.3.5Data Structure Checksum

The Data Structure Checksum is the 2’s compliment of the result of a simple 8-bit addition of the first 511 bytes in the data structure.

14.39.4S.M.A.R.T. Log Directory

Following table defines the 512 bytes that make up the S.M.A.R.T. Log Directory. The S.M.A.R.T. Log Directory is on S.M.A.R.T. Log Address zero and is defined as one sector long.

Description

Bytes

Offset

S.M.A.R.T. Logging Version

2

00h

Number of sectors in the log at log address 1

1

02h

Reserved

1

03h

Number of sectors in the log at log address 2

1

04h

Reserved

1

05h

Number of sectors in the log at log address 255

1

1FEh

Reserved

1

1FFh

 

512

 

Table 116 SMART Log Directory

The value of the S.M.A.R.T. Logging Version word shall be 01h. The logs at log addresses 80-9Fh are defined as 16 sectors long.

14.39.5S.M.A.R.T. error log sector

The following defines the 512 bytes that make up the S.M.A.R.T. error log sector. All multi-byte

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Hitachi HDS723020BLA642 manual 14.39.4 S.M.A.R.T. Log Directory, 14.39.5 S.M.A.R.T. error log sector, Attribute ID Numbers

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.