The MK2720FB and MK2720FC had the largest storage capacity, at 1.35 GB, of any 2.5-inch magnetic disk unit in the world at the time. Toshiba began shipping samples of the units in 1995.
Around this time the volume of data computers were processing was skyrocketing because of the development of smaller, more powerful computers, the popularity of Microsoft Windows, and the increase in video and audio information fueled by multimedia advancements. This ratcheted up the pressure on compact storage devices to deliver even greater storage capacities. Toshiba managed to increase the storage capacity of these units through higher density recording technologies, partial response maximum likelihood (PRML) signal processing, and improved formatting efficiencies.
The only difference between the two models was the interface: the MK2720FB had a SCSI-2 interface, and the MK2720FC had a Fast ATA interface.
| Recording capacity | 1.35GB | |
|---|---|---|
| Number of disks | 5 | |
| Interface | MK2720FB: SCSI-2 MK2720FC: Fast ATA |
|
| Average seek time | 13ms | |
| Rotational speed | 4,200rpm | |
| Transfer speeds | SCSI-2 | Synchronous mode: 10MB／s Asynchronous mode: 6MB／s |
| Fast ATA | PIO mode 4 16.6MB／s DMA mode 2 16.6MB／s |
|
| Buffer size | 128KB | |
| External dimensions [mm] | 70 x 100 x 19 (w x d x h) | |
| Weight | 220 grams | |