below.
Explanation:
The degraded status on Server 2 indicates a RAID-5 issue, typically due to a failed or failing drive. In
RAID-5 configurations, when one drive fails, the system can still operate but with reduced
performance as parity data is used to rebuild missing data on-the-fly.
Recommended Replacement Drive:
To minimize performance degradation, the replacement drive should be:
SAS HDD with the same specifications (64KB stripe size, no read-ahead, and write-back policy).
Matching the configuration exactly ensures seamless integration and optimizes recovery speed in the
RAID-5 array.
In RAID-5, degraded performance is expected when one drive fails, as parity data needs to rebuild
missing information during each read/write process. Replacing the failed drive restores the RAID
array to optimal status, reducing the load on existing drives and returning the system to normal
read/write performance. The write-back policy and disabled disk cache settings are designed to
reduce latency and increase efficiency, essential for handling real-time applications.
A user reports poor performance on the
application server.
INSTRUCTIONS
Click on Server 1 and Server 2 and review
the information presented in each chart to
determine which drives need to be replaced.
Select the appropriate replacement drive
that should be used, for the least
performance degradation to the server.
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