Iomega Bernoulli Box
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The Bernoulli Box (or simply Bernoulli) is a high-capacity removable disk storage system that was Iomega's first popular product. It was released in 1983.
The drive spins a PET film disk at about 3000 rpm, 1 micrometre over a read-write head, utilizing Bernoulli's principle. The disk cartridges are 13.6 cm wide, 14 cm long and 0.9 cm thick, and have a similar external appearance to 3½-inch floppy disks. Bernoulli disks come in the following capacities: 35 MB, 44 MB, 65 MB, 90 MB (late 1980s), 105 MB, 150 MB, and in 1994, 230 MB. There are four types of drives, grouped by the maximum readable capacity: 44 MB, 90 MB, 150 MB, and 230 MB. . The interface is usually SCSI.
The disks have a switch to enable and disable write protection.
The original Bernoulli boxes came in capacities of 5, 10, and 20 MB. They were roughly 21 cm by 27.5 cm. Drives were available as either internal units, which fit into standard 5 1/4 inch drive bays, or as external units with one or two drives in a fully self-contained case connected to the host computer via external SCSI connector.
The Bernoulli Box drives were the direct predecessors of Iomega's popular Zip drive, introduced in 1994, which used a similar technology.
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This article was originally based on material from the Free On-line Dictionary of Computing, which is licensed under the GFDL.
