Sun Microsystems Sun StorEdge 5210 NAS - Manual (Page 29)

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C H A P T E R
4
File Volume Operations
File System Concepts
The following commonly used terms are briefly described in the following list.
RAID
RAID stands for Redundant Array of Independent Disks. RAID systems allow data
to be distributed to multiple drives through an array controller for greater data
security and recoverability. The Sun StorEdge 5210 NAS offers a RAID 5 array. For
more information on RAID and RAID types, see your RAID controller
documentation.
LUN
LUN stands for Logical Unit Number. A LUN is a logical device, meaning it is
defined in software and does not necessarily conform to a physical device. In the
context of network attached storage (the Sun StorEdge 5210 NAS) the LUN defines a
block of storage space, which must be organized and subdivided to be used
effectively.