Manuals / Hitachi / Computer Equipment / Computer Drive

Hitachi HDS723020BLA642 manual 14.39.1.4S.M.A.R.T. Save Attribute Values Subcommand D3h

Models: HDS723020BLA642

1 173
Download 173 pages 57.38 Kb
Page 142
Image 142

7K200 SATA OEM Specification

14.39.1.2S.M.A.R.T. Read Attribute Thresholds (Subcommand D1h)

This subcommand returns the device’s Attribute Thresholds to the host. Upon receipt of the S.M.A.R.T. Read Attribute Thresholds subcommand from the host, the device reads the Attribute Thresholds from the Attribute Threshold sectors and then waits for the host to transfer the 512 bytes of Attribute Thresholds information from the device.

14.39.1.3S.M.A.R.T. Enable/Disable Attribute Autosave (Subcommand D2h)

This subcommand enables and disables the attribute autosave feature of the device. The S.M.A.R.T. Enable/Disable Attribute Autosave subcommand allows the device to automatically save its updated Attribute Values to the Attribute Data Sector at the timing of the first transition to Active idle mode after 30 minutes since the last saving of Attribute Values; this subcommand causes the autosave feature to be disabled. The state of the Attribute Autosave feature (either enabled or disabled) will be preserved by the device across power cycle.

A value of 00h written by the host into the device’s Sector Count Register before issuing the S.M.A.R.T. Enable/Disable Attribute Autosave subcommand will cause this feature to be disabled. Disabling this feature does not preclude the device from saving Attribute Values to the Attribute Data sectors during some other normal operation such as during a power-up or power-down.

A value of F1h written by the host into the device’s Sector Count Register before issuing the S.M.A.R.T. Enable/Disable Attribute Autosave subcommand will cause this feature to be enabled. Any other non-zero value written by the host into this register before issuing the S.M.A.R.T. Enable/Disable Attribute Autosave subcommand will not change the current Autosave status but the device will respond with the error code specified in “Table 123 S.M.A.R.T. Error Codes” on Page 155.

The S.M.A.R.T. Disable Operations subcommand disables the autosave feature along with the device’s S.M.A.R.T. operations.

Upon the receipt of the subcommand from the host the device enables or disables the Autosave feature.

14.39.1.4S.M.A.R.T. Save Attribute Values (Subcommand D3h)

This subcommand causes the device to immediately save any updated Attribute Values to the device’s Attribute Data sector regardless of the state of the Attribute Autosave feature. Upon receipt of the S.M.A.R.T. Save Attribute Values subcommand from the host, the device writes any updated Attribute Values to the Attribute Data sector.

14.39.1.5S.M.A.R.T. Execute Off-line Immediate (Subcommand D4h)

This subcommand causes the device to immediately initiate the set of activities that collect Attribute data in an off-line mode (off-line routine) or execute a self-test routine in either captive or off-line mode.

The LBA Low register shall be set to specify the operation to be executed.

LBA Low

Operation to be executed

0

Execute S.M.A.R.T. off-line data collection routine immediately

1

Execute S.M.A.R.T. Short self-test routine immediately in off-line mode

2

Execute S.M.A.R.T. Extended self-test routine immediately in off-line mode

3

Reserved

4

Execute SMART Selective self-test routine immediately in off-line mode

127

Abort off-line mode self-test routine

128

Reserved

129

Execute S.M.A.R.T. Short self-test routine immediately in captive mode

130

Execute S.M.A.R.T. Extended self-test routine immediately in captive mode

131

Reserved

132

Execute SMART selective self-test routine immediately in captive mode

142/173

Page 141 Page 143
Page 142
Image 142
Hitachi HDS723020BLA642 manual 14.39.1.4S.M.A.R.T. Save Attribute Values Subcommand D3h
Page 141 Page 143

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.