noun
nonbootable diskette
Computing term for a diskette that cannot be used to start a system. Rare in modern usage; diskettes are largely obsolete.
このディスケットはブート不可能ディスケットです。
This diskette is a nonbootable diskette.
A bootable disk, as opposed to a nonbootable one.
Compound of English-derived ブート (boot) + 不可能 (impossible) + ディスケット (diskette).