IBM 3850 data cartridge and IBM 3336 disk pack

IBM 3850 data cartridge & IBM 3336 disk pack

IBM 3850 data cartridge & IBM 3336 disk pack

IBM 3850 data cartridge & IBM 3336 disk pack

The two-by-four-inch IBM Data Cartridge, a basic component of the IBM 3850 Mass Storage System announced in October 1974, combined the storage techniques of magnetic tape and disk drives. The cartridge contained approximately 770 inches of magnetic tape where information was stored in the familiar format of IBM's 3336 disk packs -- giving the tape medium the random access characteristics of disk drives. Two cartridges could hold up to 100 million characters of information, equivalent to one disk pack.