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# Calculate Storage Requirements

When setting up a rolling buffer, consider what you intend to store and determine the amount of storage you need. It is important to allocate sufficient storage space because as soon as the buffer is full, HPE Media Server overwrites the oldest video to make space for the latest. To avoid losing important data, ensure you have sufficient capacity.

The amount of storage you should allocate to a rolling buffer depends on:

- the amount of time for which you want to keep video before it is overwritten.
- the bitrate of the video you encode to the rolling buffer.

For example, if you intend to store video for 1 week, and you encode the video at 4 megabits per second, you would need approximately 350GB of disk space.

After setting up your rolling buffer, HPE recommends that you check that the buffer is storing as much video as you expected.

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