Tom Howell on IBM, Quantum, and the Evolution of Hard Disk Drive Signal Processing (Oral History)

The interview offers valuable first-hand insights into the development of PRML and other signal processing techniques. Howell’s technical explanations are clear and detailed, and he provides context on the challenges of technology transfer and industry competition. The account is subjective and relies on memory, but it is consistent with known historical developments. The discussion of specific events, such as the 1989 demo and the Loma Prieta earthquake, adds authenticity. The sources cited are limited to the oral history transcript, but the narrative is internally coherent and technically plausible.

The title accurately reflects the content, which focuses on Tom Howell's career and contributions to signal processing in hard disk drives.

8/10

First-hand account by a key engineer, corroborated by historical context and technical details; however, relies on memory and lacks external verification.

Markers derived by PSI from the transcript: the creator did not define chapters.

• 02:00Introduction to Tom Howell's background and early career.
• 10:00Discussion of the task force that led to the creation of the signal processing group.
• 30:00Details on the development of PRML and decision feedback equalization.
• 1:00:00The 1 Gb/in² demonstration and its significance.
• 1:30:00Transition to Quantum and work on adaptive equalization.
• 2:00:00Reflections on the industry's evolution and teaching career.

• Computer History Museum Oral History Transcript — Official transcript of this oral history interview.

• Computer History Museum Oral History Transcript — Primary source for this interview.