Mechanical failure in HDDs - Head assembly & spindle motor
Amazon.com: ASHATA 304# Hard Drive Head Replacement Comb, 304# Replacement Hard Drive Head Tool Head Comb for 4-disc 2.5" HDD WD20NMVW-11W68S0 : Electronics
HDD Head Tech: Paving Way for Society's Digital Transformation | TDK
Hard disk drives (HDD)
How to Handle a Hard Drive Head Crash - Atlanta Data Recovery Service | Data Savers LLC
Read/write heads: 3D surface measurements - Polytec
Hard Disk Head Repair: How to Repair HDD Head & Recover Data