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Hitachi HDS723020BLA642 manual Command data structure, Error data structure

Models: HDS723020BLA642

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7K200 SATA OEM Specification

Command data structure: Data format of each command data structure is shown below.

Description

Bytes

Offset

Device Control register

1

00h

Features register (7:0) (see Note)

1

01h

Features register (15:8)

1

02h

Sector count register (7:0)

1

03h

Sector count register (15:8)

1

04h

Sector number register (7:0)

1

05h

Sector number register (15:8)

1

06h

Cylinder Low register (7:0)

1

07h

Cylinder Low register (15:8)

1

08h

Cylinder High register (7:0)

1

09h

Cylinder High register (15:8)

1

0Ah

Device register

1

0Bh

Command register

1

0Ch

Reserved

1

0Dh

Timestamp (milliseconds from Power-on)

4

0Eh

 

18

 

Note: bits (7:0) refer to the most recently written contents of the register. Bits (15:8) refer to the contents of the register prior to the most recent write to the register.

Table 76 Command data structure

Error data structure: Data format of error data structure is shown below.

Description

 

Bytes

Offset

Reserved

 

1

00h

Error register

 

1

01h

Sector count register (7:0)

(see Note)

1

02h

Sector count register (15:8)

(see Note)

1

03h

Sector number register (7:0)

 

1

04h

Sector number register (15:8)

1

05h

Cylinder Low register (7:0)

 

1

06h

Cylinder Low register (15:8)

1

07h

Cylinder High register (7:0)

 

1

08h

Cylinder High register (15:8)

1

09h

Device register

 

1

0Ah

Status register

 

1

0Bh

Extended error data (vendor specific)

19

0Ch

State

 

1

1Fh

Life timestamp (hours)

 

2

20h

 

 

34

 

Note: bits (7:0) refer to the contents if the register is read with bit 7 of the Device Control register cleared to zero. Bits (15:8) refer to the contents if the register is read with bit 7 of the Device Control register set to one.

Table 77 Error data structure

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Hitachi HDS723020BLA642 manual Command data structure, Error data structure
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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.