Infinite Disk was an early hierarchical storage management (HSM) and backup utility for DOS,

Microsoft Windows Windows is a group of several proprietary graphical operating system families developed and marketed by Microsoft. Each family caters to a certain sector of the computing industry. For example, Windows NT for consumers, Windows Server for serv ...

, and OS/2 published by Chili Pepper Software of Atlanta in 1992. Infinite Disk introduced HSM, previously limited to

mainframe A mainframe computer, informally called a mainframe or big iron, is a computer used primarily by large organizations for critical applications like bulk data processing for tasks such as censuses, industry and consumer statistics, enterprise ...

s, to personal computers. The company and the software were acquired by Cheyenne Software in 1995, which was in turn purchased by Computer Associates in 1996. Infinite Disk, operating in the background, automatically compresses less-active files and eventually migrates them to removable media, but the files remain visible in Windows folders and, when accessed, are fetched from the backup storage. A variant of Infinite Disk, Personal Archiver, was bundled with Iomega removable drives starting in November 1994.Business Wire, Nov 4, 1994
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References

1992 software Backup software for Windows {{storage-software-stub