In the early 1990s with improved microprocessor performance and the prevalence of Windows, there was mounting pressure on magnetic disks to deliver more storage capacity to keep up with the increasing amounts of data handled by computers. In response, Toshiba built the MK2428FB and MK2428FC 2.5-inch magnetic disk units with 520 MB of capacity, the largest for a 2.5-inch-disk unit in the world at the time. Toshiba began volume shipments of the models in 1993.
The only difference between the two models was the interface: the MK2428FB had a SCSI-2 interface, and the MK2428FC had a PC/AT interface.
| Recording capacity | 520MB | |
|---|---|---|
| Number of disks | 4 | |
| Interface | MK2428FB: SCSI-2 MK2428FC: PC/AT |
|
| Average seek time | 12ms | |
| Rotational speed | 4,000rpm | |
| Transfer speeds | Disk transfers | 18.9〜31.6Mbps |
| Host transfers | SCSI-2: 10 / 6 (synchronous/asynchronous) PC/AT: 6 |
|
| Buffer size | 512KB | |
| Power consumption | During read / write operations | 2.8W |
| In sleep mode | 0.15W | |
| External dimensions [mm] | 70 x 100 x 19 (w x d x h) | |
| Weight | 220 grams | |
