Seagate ST-412 10MB 5.25 inch MFM Hard Disk Drive Introduced in late 1981 Year
You’ll go a long way to find a drive that’s older than this one: the ST-412 powered many of the first hard disk-equipped micro computers, notably the original IBM PC-XT.
In 1979 industry veteran Al Shugart, already well-known as the former CEO of floppy drive pioneer Shugart Associates, got together with Finis Conner to co-found a new company, Shugart Technology, which was soon to become Seagate. This was the beginning of storage as we know it. Shugart was responsible for the genesis of the two hard drive interfaces that were to dominate the PC world for decades, SCSI and ST-506/412. In 1980 Shugart produced the world’s first 5.25 inch hard drive: the 5MB ST-506. The 10MB ST-412 followed in 1981, and with its selection by IBM for the PC-XT, Seagate was on the way to becoming the world’s largest drive manufacturer.
The longevity of some of these old drives is astonishing.
| Performance | 0.14 | Reliability | N/A |
| Data rate | 5 Mbit/sec | Spin rate | 3600 RPM |
| Seek time | 85ms | Actuator | Stepper |
| Platter capacity | 5MB | Interface | MFM |
| AT drive type | 1 | Form | 5¼” full-height |
| ST-412 | 10MB | 4 heads | 1981 |
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