# Maximum bit transfer rate

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## Definition Edit

The **maximum bit transfer rate** (**MBTR**):

- (Of solid state storage equipment): "the number of data bits per second transferred between the equipment and its controller."

- (Of a disk drive): "the internal data transfer rate calculated as follows:

- “MBTR” (bits per second) = B x R x T, where:
- B = Maximum number of data bits per track available to read or write in a single revolution;
- R = Revolutions per second;
- T = Number of tracks that can be used or written simultaneously."

## Source Edit

- U.S. Export Administration Regulations, Part 772 (15 C.F.R. §772.1).