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XL500S
3.10.2 Thermal Management
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. The S.M.A.R.T. temperature value is reported within ±3°C of the base
casting temperature.
Ducted airflow—Provides protection to the Read/Write element from heated air.
3.10.3 Internal Environmental Protection System
This dual filter system protects the inside environment of the drive from contamination. System
features include:
Dual 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 Rite elements from heated air
Breather filter located at low pressure area
Enhanced heat dissipation
3.10.4 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.
3.10.5 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.
3.10.6 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.
2679-701211-A06
RELEASED 10/21/10 (WD CONFIDENTIAL)
Product Features
19
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