Oral History of Sandy Bolasna

This oral history interview offers a valuable first-hand account of the technological evolution of hard disk drive head-disk interface, specifically the slider air-bearing. Sandy Bolasna’s 37-year career at IBM provides a unique perspective on the incremental innovations that enabled a five-order-of-magnitude increase in storage density. The technical content is credible, as Bolasna holds 25 patents and has published in academic journals, and the interviewer, Bruno Marchon, is a peer expert in the field, ensuring informed questioning. The interview covers the physics of the air-bearing, numerical modeling, and micro-fabrication, providing a comprehensive overview of the challenges and solutions in reducing fly height. However, the narrative is retrospective and personal, which may introduce bias or oversimplification. The focus is on Bolasna’s own contributions, and while he acknowledges the collaborative nature of the work, the broader context of industry-wide efforts is not deeply explored. The interview also touches on his early life and education, which, while interesting, takes up a significant portion of the time. The discussion of his time at Caltech, including interactions with Richard Feynman, adds a human element but is not directly relevant to the technical subject. The interview lacks detailed technical explanations of the numerical methods or specific design innovations, which might limit its value for a specialist seeking in-depth technical knowledge. Nevertheless, as an oral history, it serves as a valuable primary source for understanding the development of disk drive technology from the perspective of a key contributor. The title accurately reflects the content, and the interview is well-structured, progressing from personal background to technical career. Overall, the interview is a reliable and insightful account, though it could benefit from more technical depth.

The title accurately reflects the content, which is a personal and technical oral history of Sandy Bolasna's career.

8/10

First-hand account from a 37-year IBM veteran with 25 patents, providing detailed technical insights into slider air-bearing design. The narrative is retrospective and personal, but the technical content is credible and aligns with known industry history. The interview is conducted by a peer expert, adding to its reliability.

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

• 00:00Introduction by Bruno Marchon, outlining Sandy Bolasna's career and contributions.
• 02:00Bolasna discusses his childhood, early love for math, and education at UC Riverside.
• 05:00Bolasna describes his time at Caltech, including interactions with Richard Feynman.
• 10:00Bolasna explains his decision to join IBM, attracted by long-term benefits.
• 15:00Bolasna recounts his initial programming support role and the influence of mentor Ken Deckert.
• 20:00Bolasna begins discussing his work on slider air-bearing and the importance of fly height.
• 30:00Bolasna details the evolution of fly height from 50 microns to nanometers and key innovations.
• 40:00Bolasna discusses numerical modeling and micro-fabrication techniques used in slider design.
• 50:00Bolasna reflects on the collaborative environment at IBM and the importance of pattern recognition.
• 1:00:00Bolasna shares his post-retirement teaching activities and final thoughts.

• Computer History Museum Catalog Entry — Official catalog entry for the oral history interview, providing transcript and metadata.

• Computer History Museum Catalog Entry — Official catalog entry for the oral history interview, providing transcript and metadata.