(1) A section within earlier IT departments that retained offline media in the form of microfilm, optical discs, tape reels and removable disk and tape cartridges. Today, tape cartridges are the only physical medium a business might need to archive in a dedicated storage room. See
LTO.
(2) An online storage peripheral. See
tape library and
disk library.
The Data Library
Years ago, this was a common section in datacenters when open reel tapes and removable disk packs were the norm. See
disk pack and
open reel.