Slow performance on PERC H710P RAID 1 Array running VMware images


Slow performance on PERC H710P RAID 1 Array running VMware images





Follow the steps below to resolve an issue with slow performance on a Dell PERC H710P RAID 1 Array running VMware images.


Slow performance on PERC H710P RAID 1 Arrays.

A Precision T3600 configured with a PERC H710P RAID controller and a pair of 3TB drives in a RAID 1 configuration may experience slow performance running multiple VMware images. If the system is configured with a RAID 0 configuration, no performance issues areindicated in that configuration.

Troubleshooting isolated the performance bottleneck to the RAID controller.


Enable Read Ahead and Write Back.

Enabling the Read Ahead and Write Back capabilities in the advanced settings of the RAID controller resolves the issue (Figure 1).

Enable Read Ahead and Write Back
Figure 1: Enable Read Ahead and Write Back in advanced settings of RAID controller

NOTE: A backup battery for the RAID controller and onboard controller memory is strongly recommended to prevent data loss if power is lost to the system.



Article ID: SLN299315

Last Date Modified: 10/07/2019 02:07 PM

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