noun
drum storage; magnetic drum memory
Historical computing term for a magnetic drum used as main memory or secondary storage, common in early computers.
初期のコンピュータでは、ドラム記憶装置が主記憶として使われていた。
In early computers, drum storage was used as main memory.
磁気ドラム refers to the physical magnetic drum itself, while ドラム記憶装置 emphasizes the complete storage unit or device.
Compound of ドラム (drum) + 記憶 (memory) + 装置 (device), a direct calque from English 'drum storage' or 'drum memory'.