# Changing the stripe-unit size

Notes:
  1. This action is supported in startable-CD mode only.
  2. This action is not supported on the integrated RAID controller.

Use this action to set the size of the chunk of data that the controller reads from each physical drive at a time. To maximize overall performance, choose a stripe-unit size that is close to the size of the system I/O request.

Attention: After you configure an array and store data on the logical drives, you cannot change the stripe-unit size without destroying data in the logical drives.

1. In the tree, click (controller).
2. Right-click Change stripe-unit size a stripe-unit size. The following choices are available:
   - 8 KB

   > With this stripe-unit size, an array can have a maximum of 16 physical drives.

   - 16 KB

   > With this stripe-unit size, an array can have a maximum of 16 physical drives.

   - 32 KB

   > This setting is available if the controller supports an array with 16 physical drives using a 32 KB stripe-unit size, or the controller contains no arrays with more than 8 physical drives. Otherwise, this setting is unavailable.

   - 64 KB

   > This setting is available if the controller supports an array with 16 physical drives using a 64 KB stripe-unit size, or the controller contains no arrays with more than 8 physical drives. Otherwise, this setting is unavailable.

## More information

- Fine-tuning your system
- Understanding stripe-unit size
- Understanding enabled and disabled read-ahead cache mode

Glossary | Contents

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