Seagate ST-225-1 21.4MB 3600RPM MFM 5.25-Inch Hard Drive

SKU ST-225-1

Brand Seagate

Capacity: 21.4 MB
Interface: MFM
Rotational Speed: 3600 RPM
Form Factor: 5.25-Inch
Manufacturer: Seagate
Model: ST-225-1

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Key specifications

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Capacity: 21.4 MB
Interface: MFM
Rotational Speed: 3600 RPM
Form Factor: 5.25-Inch

Product details

The Seagate ST-225-1 is a 5.25-inch MFM hard drive with a capacity of 21.4MB. It operates at a rotational speed of 3600RPM and utilizes the MFM (Modified Frequency Modulation) interface, characteristic of early personal computer storage.

Technical Information

Capacity	21.4 MB
Interface	MFM

Additional Specifications

Rotational Speed	3600 RPM
Form Factor	5.25-Inch

Description

The Seagate ST-225-1 is a historical piece of computing hardware, representing one of the early generations of hard disk drives designed for personal computers. Its 21.4MB capacity was considered substantial in the early to mid-1980s, enabling the storage of operating systems like MS-DOS and a collection of applications and user files. This drive utilizes the MFM (Modified Frequency Modulation) interface, a data encoding scheme used before the widespread adoption of IDE (Integrated Drive Electronics) and SCSI. MFM drives required separate controller cards and were known for their relatively complex cabling and setup. The 3600 RPM spindle speed was typical for drives of this era, offering a balance between access time and mechanical reliability. The 5.25-inch form factor was standard for floppy disk drives and early hard drives, fitting into the large drive bays common in computers of the time. The ST-225-1, along with similar MFM drives, played a crucial role in making personal computers more practical by providing persistent storage that was significantly faster and larger than floppy disks.

Condition: Refurbished