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locals, the = L = locked up

locked and loaded adj.,obs.

[from military slang for an M-16 rifle with magazine inserted and prepared for firing] Said of a removable disk volume properly prepared for use -- that is, locked into the drive and with the heads loaded. Ironically, because their heads are `loaded' whenever the power is up, this description is never used of Winchester drives (which are named after a rifle).

--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.