When to Add More Read Cache Devices (BUI)
Use the following procedure to determine if you need more read cache devices for the
appliance.
Before You Begin
Go to Maintenance > Hardware to identify which chassis and slots contain read cache
devices.
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Create a worksheet as described in Creating a Worksheet (BUI).
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Click the add icon
next to Add statistic.
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Go to DISK > I/O operations > Broken down by disk.
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Select a read cache device.
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Click the drilldown icon
and select Percent utilization.
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Repeat steps 4 and 5 for all existing read cache devices.
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Wait at least 10 minutes.
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Examine the graph(s).
You may want to add more read cache devices when existing devices are 90%
utilized.