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Hitachi HDS723020BLA642 manual Status Register, Bsy

Models: HDS723020BLA642

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7K200 SATA OEM Specification

7

BSY

6

DRDY

5

DF

4

DSC

3

DRQ

2

CORR

1

IDX

0

ERR

Table 28 Status Register

This register contains the device status. The contents of this register are updated whenever an error occurs and at the completion of each command.

If the host reads this register when an interrupt is pending, it is considered to be the interrupt acknowledge. Any pending interrupt is cleared whenever this register is read.

If BSY=1, no other bits in the register are valid.

Bit Definitions

 

BSY

Busy. BSY=1 whenever the device is accessing the registers. The host should not read or

 

write any registers when BSY=1. If the host reads any register when BSY=1, the contents of

 

the Status Register will be returned.

DRDY (RDY)

Device Ready. RDY=1 indicates that the device is capable of responding to a command.

 

RDY will be set to 0 during power on until the device is ready to accept a command.

DF

Device Fault. DF=1 indicates that the device has detected a write fault condition. DF is set to

 

0 after the Status Register is read by the host.

DSC

Device Seek Complete. DSC=1 indicates that a seek has completed and the device head is

 

settled over a track. DSC is set to 0 by the device just before a seek begins. When an error

 

occurs, this bit is not changed until the Status Register is read by the host, at which time the

 

bit again indicates the current seek complete status.

 

When the device enters into or is in Standby mode or Sleep mode, this bit is set by device in

 

spite of not spinning up.

DRQ

Data Request. DRQ=1 indicates that the device is ready to transfer a word or byte of data

 

between the host and the device. The host should not write the Command register when

 

DRQ=1.

CORR (COR)

Corrected Data. Always 0.

IDX

Index. Always 0

ERR

ERR=1 indicates that an error occurred during execution of the previous command. The

 

Error Register should be read to determine the error type. The device sets ERR=0 when the

 

next command is received from the host.

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Hitachi HDS723020BLA642 manual Status Register, Bsy
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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.