Hitachi SR-302

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Brand: Hitachi

The Hitachi SR-302 is a personal computer floppy disk drive (FDD) that was widely used in the late 1980s and early 1990s. It can read and write 360 kilobyte (KB) double-density (DD) floppy disks at a rate of 300 kilobits per second (Kbps). This drive was commonly used in computers based on the NEC V20 and V30 processors, as well as on early IBM-compatible PCs that lacked built-in floppy disk controllers.The SR-302 is a 5.25-inch (133 mm) form factor drive, meaning that it uses larger 5.25-inch floppy disks instead of the more recent and smaller 3.5-inch format. The drive uses a motor to spin the disk at a constant speed of 300 revolutions per minute (RPM), and features a single read-write head that floats above the spinning disk on a cushion of air. The tail end of the head is coated with a thin layer of magnetic material, allowing it to read and write data onto the magnetic media of the floppy disks.The SR-302 operates with a standard voltage of 5 volts (V) and requires an interface adapter known as a interface card (ISA) on an ISA-based motherboard to communicate with the host computer. This interface card provides the necessary signals and connectors to connect the SR-302 to the data bus and address pins on the motherboard.Overall, the Hitachi SR-302 was a popular and reliable storage device in its time, offering high data capacity and transfer rates for personal computers. Although it is now obsolete in the age of cheap and high-capacity solid-state drives (SSDs), it holds a special place in the history of personal computer technology for its role in the early development of the PC industry.