[ INDIVIDUAL COMPONENT // HARD DISK DRIVE ]
Seagate ST-412
10 MB full-height MFM hard disk, early 1980s. This record is limited to the exact model and documented variant; related model numbers, revisions and capacities can have different interfaces and specifications.
IDENTIFICATION: Match the complete label, suffix, firmware and drive inquiry with the cited model documentation. Do not infer sector format or recording method from product family alone.
Verified model specifications
| Dedicated catalog subcategory | MFM and early magnetic drives |
|---|---|
| Exact model | Seagate ST-412 |
| Product generation | 10 MB full-height MFM hard disk, early 1980s |
| Form factor | 5.25-inch full-height class; this classification is not a dimensional drawing. |
| Interface | ST-506/ST-412-compatible MFM; separate data and control cables to a compatible controller. |
| Capacity, performance, sector / recording details | The ST-412 OEM manual specifies a 10 MB formatted class drive and model-specific geometry. Preserve the manual’s exact geometry and controller formatting; formatted capacity depends on controller and format. |
| Compatibility | Needs an MFM/ST-506 controller with matching geometry, correct drive select/termination, and separate control/data cabling. Not compatible with IDE or SCSI hosts directly. |
Handling, service & preservation
- Record the original jumper and termination positions, cable routing, controller geometry, and power supply before service. Do not interchange cable position based on modern connector assumptions.
- Photograph the full label, board marks, connectors, jumpers/carrier, and date/firmware codes before service; retain the exact model suffix with collection metadata.
- Never open a hard drive outside a qualified clean environment. Stop repeated power-on attempts if the unit clicks, drops offline, or develops read errors.
- Preserve source data by making independent copies and validating checksums; SMART/self-tests cannot guarantee reliability. Distinguish measured condition from manufacturer specifications.
Model-specific source
- Seagate ST-412 OEM Product Manual (April 1982; archival scan)Original Seagate OEM manual scan; specifications and setup are for ST-412, not the later ST-225 family.
For variants with family manuals, use the model-specific table and document revision that matches the drive label.