starter, understudy, offsite, deduplication, deposit box, undelete, removable disk, subbing, archiving, setup, replication, replacement, storage, stopgap, fallback, disk, syncing, stringer, rookie, server, workhorse, journeyman, continuity, assentor, downtime, benching, encryption, synchronization, restoral, castoff, diskless, securable, fumbler, blocker, benchwarmer, riss, placeholder, nonvolatile storage, uptime, rotation, firewalling, autoloader, midrange, data encryption, standby, handoffs, scp, loaner, migrator, reserve, hoster, terabyte, spooler, racerunner, freeware, versatility, insp, autonomics, manageability, configuration, retrieval, placekick, utility, scratchpad, weakside, switching, ssh, archival, decryption, snaps, clipboard, loran, prostyle, workload, mesh topology, antivirus, callback, petabyte, receiver, degaussing, isogon, mimer, stopper, triggerman, helpdesk, reliability, recoding, mainframe, gimpy, pabx, redshirt, heir apparent, ignitor, herniated disc, provisioning, troubleshooting, mop, snapper, sparkplug, returner, paging, caching, backups, update, cleanup, login, reset, briefing, directory, installation, startup, updates, documentation, download, operation, printout, upgrade, email, check, checkout, descriptor, checking, cryptographic, multimedia, access, customized, inhouse, instructional, 1-2-3, archive, customised, fighting, unneeded, audio, available, editing, offline

alternate, double, locum, locum tenens, stunt man, stunt woman, surrogate

compeer, duplicate, duplication, equal, match, peer

backup man, computer backup, fill-in, relief, stand-in, substitute