Seagate ST-213 10MB Half-Height MFM Hard Drive 5.25 Vintage XT AT IBM PC

Seagate ST-213 10MB Half-Height MFM Hard Drive 5.25 Vintage XT AT IBM PC

The Seagate ST-213 is a 10MB half-height 5.25-inch hard disk drive using the MFM (Modified Frequency Modulation) interface, one of the earliest hard drive interface standards used in personal computing. Manufactured by Seagate Technology and assembled in Singapore, the ST-213 was among the drives that brought affordable fixed-disk storage to the IBM PC XT and AT platforms during the early-to-mid 1980s.

Specifications & What's Included

• Brand: Seagate Technology
• Model: ST-213
• Storage Capacity: 10 MB
• Interface: MFM (Modified Frequency Modulation)
• Form Factor: 5.25-inch Half-Height
• Connector: MFM 34-pin control + 20-pin data edge connectors (visible on front edge)
• Power Connector: 4-pin Molex (visible on rear)
• Country of Assembly: Singapore (per label)
• Certifications: UL, CSA (per label)
• Drive only — no controller card included

Applications

The ST-213 was designed for use with IBM PC XT and AT-class computers, as well as compatible clone systems running MS-DOS from the mid-1980s. MFM drives of this type required a separate MFM/RLL controller card — commonly the Western Digital WD1003 or similar — which handled the encoding and interface translation between the drive and the ISA bus. These drives were standard storage in business PCs, word processing workstations, and early engineering systems of the era. Today the ST-213 is sought after by vintage computing enthusiasts restoring IBM XT/AT machines, collectors preserving early PC hardware, and hobbyists running period-correct DOS builds. Because MFM drives have no onboard controller logic, they are mechanically straightforward, and working examples are increasingly hard to find — making a tested unit especially valuable for restoration projects.