HDD nie je vo vakuu, pretoze bez tlaku vzduchu by nefungoval, disk je len v kompletne cistom prostredi. Hlavice disku sa po vyrobe posielaju do tovarne zabalene vo vakuu kvoli cistote.
http://hddscan.com/doc/HDD_from_inside.html
Citácia:
You can see motor and heads contacts which were hiding under the PCB. There is also small almost unnoticeable hole on HDA. This hole called Breath hole. You maybe heard old rumor which says that HDD has vacuum inside, well that is not true. HDD uses Breath hole to equalize pressure inside and outside HDA. From the inside Breath hole closed by Breath filter to make air clean and dry.
Strucny preklad, v HDD je mala dierka, ktora vyrovnava tlak, samozrejme s filtrom kvoli spominanej cistote.
nieje vo vakuu pretoze na vznasanie hlaviciek nad magnetickymi doskamy sa vyuziva odpor vzduchu. A uz par diskov som rozobral takze potvrdzujem ze nieje 
