Thermal Management; Internal Environmental Protection System; Recoverable Errors; Unrecoverable Errors - Western Digital WD15NPVX Technical Reference Manual

Wd green mb500m-6gb sata 6 gb/s hard drives
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Product Features
3.9.2
The drive is designed with Thermal Management features for high reliability.
State-of-the-art mechanical design—Mechanical design is optimized to reduce the drive's
temperature. State-of-the-art thermal dissipation and windage design is employed.
Closed loop servo management—Thermal management monitors the drive temperature and can
control servo operations to maintain a stable operating temperature under high temperature
conditions. This is a closed loop servo and thermal control system.
S.M.A.R.T. HDA Temperature Attribute—The S.M.A.R.T. HDA Temperature Attribute is
supported.
Ducted airflow—Provides protection to the Read/Write element from heated air.
3.9.3
This system protects the inside environment of the drive from contamination. System features include:
Filtration System to ensure fast clean-up times
Directed airflow to maximize mechanical cooling
Increase casting surface area to maximize cooling
Ducted air flow to protect read/write elements from heated air
Breather filter located at low pressure area
Enhanced heat dissipation
3.9.4
A sector marked for repair is written back to the same location. The sector is then read several times to
be sure that it was written correctly and that there is no media damage at its location (sector test). If the
sector does not easily and consistently read correctly, the sector is then relocated with original data.
3.9.5
If an unrecoverable error is found during the offline scan, the sector is marked. Future reads from this
location will continue to perform full error recovery. However, the next write to this location will
perform a sector test to be sure the media is not damaged, and the sector relocated if the sector test fails.
3.9.6
Self Test is a quick way to determine the operation status of a drive. The following Self Tests are
supported:
Quick Test: Completes in less than two minutes.
Extended Test: Tests all the critical subsystems of the drive.
Conveyance Test: Quickly identifies issues caused by handling damage.
Selective Test: Scans host-defined sections of the drive.
The test may be run to completion or be performed as a background task as the drive processes other
commands from the host. The host may then poll the drive for runtime status and test results. Since the
test is embedded in the drive's firmware, it is always available, requires no installation and can be faster
and more effective than a software-based drive test.
3.9.7
ATA Error Logging provides an industry standard means to record error events and supporting
information that is then accessible by the host. The event record includes the exact command that
caused the failure, the response of the drive, the time of the event and information about the four
commands immediately prior to the errant command. Error Logging can reliably and quickly
16

Thermal Management

Internal Environmental Protection System

Recoverable Errors

Unrecoverable Errors

Self Test

ATA Error Logging

RELEASED 5/2/13 (WD CONFIDENTIAL)
WD Green MB500M-6Gb
2679-771422-A00

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