Product Features
WD Scorpio MX375M
18
RELEASED 11/17/10 (WD CONFIDENTIAL)
2679-771293-A01
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.
Defects managed at the factory are sector slipped. Grown defects that can occur in the field are mapped
out by relocation to spare sectors on the inner cylinders of the drive.
