Hitachi HDS723020BLA642 manual Self-test descriptor index, Command Error information

Models: HDS723020BLA642

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7K200 SATA OEM Specification

14.16.3.2Self-test descriptor index

This indicates the most recent self-test descriptor. If there have been no self-tests, this is set to zero. Valid values for the Self-test descriptor index are 0 to 18.

14.16.3.3Extended Self-test log descriptor entry

The content of the self-test descriptor entry is shown below.

Description

 

Bytes

Offset

Self-test number

1

00h

Self-test execution status

1

01h

Power-on life timestamp in hours

2

02h

Self-test failure check point

1

04h

Failing LBA

(7:0)

1

05h

Failing LBA

(15:8)

1

06h

Failing LBA

(23:16)

1

07h

Failing LBA

(31:24)

1

08h

Failing LBA

(39:32)

1

09h

Failing LBA

(47:40)

1

0Ah

Vendor specific

15

0Bh

 

 

26

 

Table 79 Extended Self-test log descriptor entry

 

 

14.16.4Command Error

The following table defines the format of the Command Error data structure.

Byte

7

6

5

 

4

 

3

 

2

1

0

0

NQ

UNL

Rsv

 

 

 

 

 

TAG

 

 

1

 

 

 

 

Reserved

 

 

 

2

 

 

 

 

Status

 

 

 

3

 

 

 

 

 

Error

 

 

 

4

 

 

 

 

LBA Low

 

 

 

5

 

 

 

 

LBA Mid

 

 

 

6

 

 

 

 

LBA High

 

 

 

7

 

 

 

 

Device

 

 

 

8

 

 

 

LBA Low Previous

 

 

 

9

 

 

 

LBA Mid Previous

 

 

 

10

 

 

LBA High Previous

 

 

11

 

 

 

 

Reserved

 

 

 

12

 

 

 

 

Sector Count

 

 

 

13

 

 

Sector Count Previous

 

 

14 – 255

 

 

 

 

Reserved

 

 

 

256 – 510

 

 

 

Vendor Unique

 

 

 

511

 

 

Data Structure Checksum

 

 

Table 80 Command Error information

The TAG field (Byte 0 bits 4-0) contains the tag number corresponding to a queued command, if the NQ bit is cleared.

The UNL field (Byte 0 bit 6) indicates whether the error condition was a result of receiving an IDLE IMMEDIATE command with the Unload Feature. If cleared to zero, the reason for the error was not due to reception of an IDLE IMMEDIATE command with Unload Feature.

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Hitachi HDS723020BLA642 manual Command Error, Self-test descriptor index, Extended Self-test log descriptor entry

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.