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Boosted by isagalaev ("Ivan Sagalaev :flag_wbw:"):
altomare@oldbytes.space ("Altomare") wrote:

Some neat info about 70s hard drive contaminants.

From the DEC RK05 disk drive maintenance manual (DEC-00-HRK05-C-D)

#retrocomputing #dec

""Relationship of Disk Head, Disk, and Contaminants" Graph showing a side/cutoff view of hard drive reading head over the platter, with size comparisons: * Space between the head & platter: 100µ * Smoke particle: 250µ * Fingerprint smudge: no unit but it's drawn twice as big as the smoke particle * Lint & dust: no unit either, 4 times bigger(ish) than the smudge * Humar hair: .004" The oxide layer on the disk is 200µ wid