Magnetic Peripherals 94205-051 Hard Disk Drive

The Magnetic Peripherals 94205-051 Hard Drive (WREN IIHH) is a vintage 5.25-inch, half-height MFM disk drive designed for data storage in legacy industrial computers and OEM control systems. It uses the ST506 MFM interface, with unformatted capacity of 52 MB and formatted capacity of 43 MB, spinning at 3,600 RPM with 5 heads, 989 cylinders, 17 sectors per track, and 512 bytes per sector. The drive delivers an internal data transfer rate of 0.625 MB/s and requires +5 VDC and +12 VDC supply voltages. Common applications include CNC machines, programmable controllers, process control systems, telecommunications equipment, and laboratory instruments in legacy automation equipment, with maintenance technicians and system integrators relying on it for repair, retrofit, restoration, and replacement to preserve compatibility with older hardware.