Analysis of information sources in references of the Wikipedia article "قرص صلب" in Arabic language version.
Each disk-storage unit has three mechanically independent access arms, all of which can be seeking at the same time.
The disk storage unit can have two access arms. One is standard and the other is available as a special feature.
IBM 350 disk drive held 3.75 MB
IBM 350 disk drive held 3.75 MB