Changing the Read Cache Setting

When read caching is enabled, the controller monitors read access to a logical drive and, if it sees a pattern, pre-loads the cache with data that seems most likely to be read next, thereby improving performance. You can set the Read Cache to:
  • Enabled—The controller transfers data from the logical drive to its local cache in portions equal to the stripe size. Use this setting for the best performance when workloads are steady and sequential. Enabled is the default setting.
  • Disabled—The controller transfers data from the logical drive to its local cache in portions equal to the system I/O request size. Use this setting for the best performance when workloads are random or the system I/O requests are smaller than the stripe size.
Note: For additional performance gains in read-intensive applications, you can also use maxCache read caching. For more information, see Changing maxCache Settings for a Logical Drive.

To quickly change the read cache setting:

  1. In the Enterprise View, select a controller, then select a logical drive on that controller.
  2. On the ribbon, in the Logical Device group, click Set Properties.

    The Set Properties window opens.

  3. In the Read Cache drop-down list, select Enabled or Disabled, as needed.
  4. Click OK.

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