When to Add More Write Log Devices (BUI)

Use the following procedure to determine if you need more write log devices for the appliance.

Before You Begin

Go to Maintenance > Hardware to identify which chassis and slots contain write cache devices.

1. Create a worksheet as described in Creating a Worksheet (BUI).
2. Click the add icon next to Add statistic.
3. Go to DISK > Disks > Broken down by percent utilization.
4. Select a write log device.
5. Click the drilldown icon and select As a raw statistic.
6. Repeat steps 4 and 5 for all existing write log devices.
7. Wait at least 10 minutes.

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   Note -  Ten minutes is a general guideline. This amount of time may be adjusted if you have a performance-sensitive, short-duration synchronous write workload.

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8. Examine the graph(s).

   You may want to add more write log devices when existing devices are 90% utilized.