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Hitachi HDS723020BLA642 manual Power Mode, Power Management Commands, Status

Models: HDS723020BLA642

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7K200 SATA OEM Specification

12.5.1Power Mode

Sleep Mode

The lowest power consumption when the device is powered on occurs in Sleep Mode.

 

When in sleep mode, the device requires a reset to be activated.

Standby Mode

The device interface is capable of accepting commands, but as the media may not

 

immediately accessible, there is a delay while waiting for the spindle to reach

 

operating speed.

Idle Mode

Refer to the section of Adaptive Battery Life Extender Feature.

Active Mode

The device is in execution of a command or accessing the disk media with read

 

look-ahead function or write cache function.

12.5.2Power Management Commands

The Check Power Mode command allows a host to determine if a device is currently in, going to or leaving standby mode.

The Idle and Idle Immediate commands move a device to idle mode immediately from the active or standby modes. The idle command also sets the standby timer count and starts the standby timer.

The sleep command moves a device to sleep mode. The device’s interface becomes inactive at the completion of the sleep command. A reset is required to move a device out of sleep mode. When a device exits sleep mode it will enter standby mode.

The Standby and Standby Immediate commands move a device to standby mode immediately from the active or idle modes. The standby command also sets the standby timer count.

12.5.3Standby/Sleep command completion timing

1.Confirm the completion of writing cached data in the buffer to media

2.Unload heads on the ramp

3.Set DRDY bit and DSC bit in Status Register

4.Activate the spindle break to stop the spindle motor

5.Wait until spindle motor is stopped

6.Perform post process

12.5.4Status

In the active, idle and standby modes, the device shall have RDY bit of the status register set. If BSY bit is not set, device shall be ready to accept any command.

In sleep mode, the device’s interface is not active. A host shall not attempt to read the device’s status or issue commands to the device.

12.5.5Interface Capability for Power Modes

Each power mode affects the physical interface as defined in the following table:

Mode

 

BSY

RDY

Interface active

Media

Active

 

x

x

Yes

Active

Idle

 

0

1

Yes

Active

Standby

 

0

1

Yes

Inactive

 

 

 

 

 

 

Sleep

 

x

x

No

Inactive

 

 

 

 

 

 

Table 34 Power conditions

Ready(RDY) is not a power condition. A device may post ready at the interface even though the media may not be accessible.

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Hitachi HDS723020BLA642 manual Power Mode, Power Management Commands, Standby/Sleep command completion timing, Status
Page 53 Page 55

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.