WD Scorpio ML160M
Product Features
2679-701205-A00
RELEASED 1/16/09 (WD CONFIDENTIAL)
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3.6.3
Internal Environmental Protection System
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
3.6.4
Recoverable Errors
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.
3.6.5
Unrecoverable Errors
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.
3.6.6
Self Test
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.
3.6.7
ATA Error Logging
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 determine whether a system problem is the result of a hard drive failure or other
component malfunction. Error Logging retains total error count for the life of the drive and
complete records for the last five errors.
3.6.8
Defect Management
Every WD drive undergoes factory-level intelligent burn in, which thoroughly tests for and
maps out defective sectors on the media before the drive leaves the manufacturing facility.
Following the factory tests, a primary defect list is created. The list contains the cylinder, head,
and sector numbers for all defects.
