backup rotation

backup rotation

(operating system)Any system for re-using backup media,e.g. magnetic tape. One extreme would be to use the samemedia for every backup (e.g. copy disk A to disk B), the otherextreme would be to use new media every time. The trade-offis between the cost of buying and storing media and theability to restore any version of any file. One example isthe Grandfather, Father, Son (GFS) scheme.