# Changing the write-cache mode on a physical drive

Use this action to change the write-cache mode setting of a ready physical drive. The write-cache mode determines if the physical drive stores data before or after sending a confirmation to the controller.

Note: (Integrated RAID controller only) When you create an array, the two physical drives must have the same write-cache mode setting. The default setting is write through. To set the write-cache mode to write back, you must change the write-cache mode on every physical drive in the array.

Attention: It is possible to lose data if a power outage occurs while using the write-back setting. Consider carefully whether to use the write-back setting on a physical drive. Depending on how you use the system, the write-back setting might be undesirable.

1. In the tree, click (ready physical drive).
2. Right-click Change write-cache mode to write back or write through.
3. Click Yes to confirm.

## More information

- Understanding write-cache mode for physical drives

Glossary | Contents

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