IBM's i5/OS groups disk drives into Assigned Storage Pools, generally referred to as "ASP"s. By default, all disk drives are assigned to pool 1. Additional pools can be created, but this is rarely done anymore. The concept of i5/OS pools is similar to the Unix/Linux concept of volumes; however, with i5/OS it is typical for all disk drives to be assigned to a single ASP. OS/400 is an operating system used on IBMs line of AS/400 (now called iSeries) minicomputers. ... OS/400 is an operating system used on IBMs line of AS/400 (now called iSeries) minicomputers. ... Unix (officially trademarked as UNIX) is a computer operating system originally developed in the 1960s and 1970s by a group of AT&T employees at Bell Labs including Ken Thompson, Dennis Ritchie, and Douglas McIlroy. ... Linux, or GNU/Linux, refers to any Unix-like computer operating system which uses the Linux kernel. ... OS/400 is an operating system used on IBMs line of AS/400 (now called iSeries) minicomputers. ...