LUN management at the heart of SAN configuration

Disk drives are the foundation of modern data storage, but operating systems cannot use physical storage directly. The physical drive must be translated into a logical space that an operating system sees as a linear address space comprised of fixed-size blocks. Storage networks must also partition their physical disks into logical entities so that host servers can access storage area network (SAN) storage, and each logical portion is called a logical unit number (LUN). This article explains essential LUN concepts and the role of LUNs in SAN technology.

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