Read/Write Long; Temperature Reporting; Reliability Features Set; Data Lifeguard - Western Digital WD15NPVX Technical Reference Manual

WD Green MB500M-6Gb
a specific pattern by sending this command with the pattern as a parameter—no data transfer is
necessary. Write Same can write the entire media, or just a portion of the media. The host can monitor
the progress of the Write Same by issuing SCT Status requests. This frees the host system to do other
tasks while the media is being cleared.
3.8.2
The function performed by the Long Sector Access command is based on the obsolete ATA READ
LONG/WRITE LONG capability, and has been extended beyond 28-bit addressing. The Long Sector
data format for both reads and writes is two blocks long (i.e., each block is 512 bytes long). The first
block contains the user data. The second data block contains the error correction and detection bytes.
The remainder of the second block should contain zeros. Once the SCT command has been issued and
the status response indicates that the device is ready to transfer data, log page E1h should be read or
written to transfer the data. Long Sector Access commands cause a forced unit access to occur.
3.8.3
The SCT Temperature Reporting (SCT TR) feature allows a host system to access temperature
information in the drive. This information can been used to control fans or adjust the usage of various
system components to keep the drive within its normal operating temperature. Applications include
Enterprise, Laptop, Desktop and Consumer Electronics. SCT TR reports the maximum and minimum
sustained operating limits, warning level limits, and drive damage limits. In addition to reporting the
limits, SCT TR returns the current drive temperature (a temperature history which the host can use to
predict heating or cooling trends) and the maximum temperature acheived during the lifetime of the
drive as well as the highest temperature achieved since the power was applied to the drive. Detailed
information on this capability can be found in ATA8-ACS.
3.9

Reliability Features Set

3.9.1
Representing WD's ongoing commitment to data protection, Data Lifeguard includes features that
enhance the drive's ability to prevent data loss. Data Lifeguard data protection utilities include thermal
management, an environmental protection system, and embedded error detection and repair features
that automatically detect, isolate, and repair problem areas that may develop over the extended use of
the hard drive. With these enhanced data reliability features, the drive can perform more accurate
monitoring, error repair, and deliver exceptional data security.
This self-tuning feature is performed during offline data collection scan. All user sectors on the hard
drive are scanned during times of no activity from the host. Any sector determined to be written poorly
(e.g., off-track), or that is difficult to recover (e.g., because of a developing media defect or thermal
asperity), is marked for repair. Data Lifeguard actively guards your data, even if S.M.A.R.T. operations
are disabled.
All WD drives are defect-free and low-level formatted at the factory. After prolonged use, any drive,
including a WD drive, may develop defects. If you continue receiving data errors in any given file, use
the Data Lifeguard Diagnostics utility to recover, relocate and rewrite the user data to the nearest spare
sector and maintain a secondary defect list.
CAUTION:As with all format utilities, some options in the Data Lifeguard Diagnostics
Download the latest versions of the Data Lifeguard Diagnostic and Data Lifeguard Tools programs at
http://support.wd.com.
1. Default shipping configuration has Data Lifeguard feature disabled for power management
optimization.
2679-771422-A00

Read/Write Long

Temperature Reporting

1

Data Lifeguard™

utility will overwrite user data.
RELEASED 5/2/13 (WD CONFIDENTIAL)
Product Features
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