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The Read/Write Performance of the S2600 Decreases for it has a Single Power Supply

Publication Date:  2012-07-20 Views:  318 Downloads:  0
Issue Description
The S2600 is installed in a single-path iSCSI network and configured with a single power supply. The LUNs mapped from the S2600 to a host can be normally accessed. However, the read/write performance tested by the IOmeter tool is low. Under normal circumstances, the performance is 100 Mbit/s, but under the single power supply circumstance, the performance is only 20 Mbit/s
Alarm Information
Handling Process
Power the S2600 by using dual power supplies. The LUN write policy is automatically restored to write-back and mirroring.  
Root Cause
If the S2600 is configured with a single power supply, its LUN write policy is changed from write-back and mirroring to write-through, which dramatically reduces the read/write performance.  
It is recommended to power the S2600 by using dual power supplies for a high system performance.