Adaptec 29320A-R User Guide - Page 197
Glossary-4, Adaptec Ultra320 SCSI Cards User, s Guide
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Adaptec Ultra320 SCSI Cards User's Guide I initialized array An array that is ready for data reads and writes. L logical device A read/write resource, such as an array or spare, that does not exist until configured by the Software Management tool. Logical Unit Number See LUN. low-level format A low-level format completely cleans any data off the hard disk. LUN Stands for Logical Unit Number. The number assigned to a subdevice (logical unit) of a SCSI target. Each SCSI target can contain up to eight subdevices numbered 0 through 7; however, most SCSI devices contain only one subdevice (LUN 0). M mirroring; mirrored array Synonym for RAID 1. Full redundancy is obtained by maintaining identical copies of data on two or more hard disks. Mirroring provides fault tolerance with a minor performance penalty. monitoring The process of receiving, displaying, and logging system events. O off-line array An array that is not responding. P parity In RAID, a form of redundancy used to recreate the data of a failed hard disk in a disk array. Used in RAID levels 2, 3, 4, and 5. Glossary-4