head-disk-interface · shipping · also HDI, head disk interface

Head-disk interface (HDI)

The head-disk interface is the interacting region between an HDD's head-carrying slider and rotating disk surface.

Related Observatory article: Head-disk interface (HDI) on hesela.com

The interface involves gas-film support, local clearance and surface interactions, not the SATA or SAS host connection. Ma et al. distinguish passive flight, touchdown transition and stronger modulation using specialized head-media spacing and touchdown-sensor signals [1]. A controlled contact experiment is not a count of catastrophic failures in an operating fleet [2].

Relations

related

hdd, flying-height, thermal-flying-height-control, rotational-vibration, head-slap, touchdown-sensor

Citations

1. Ma et al.: Head disk interface characterization, CML report 15013, introduction and experiment (accessed 2026-10-15)
2. Hesela: HDD mechanical faults, evidence and diagnostic limits (accessed 2026-10-15)

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