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HP Surestore Disk Array 12h and FC60 User Manual

Page 449

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449

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created on the same disk array. A numeric value is assigned to a LUN at the time it is
created.

LVD-SCSI

Low voltage differential implementation of SCSI. Also referred to as Ultra2 SCSI.

LVM (Logical Volume Manager)

The default disk configuration strategy on HP-UX. In LVM one or more physical disk
modules are configured into volume groups that are then configured into logical
volumes.

loop address

The unique ID of a node in Fibre Channel loop topology, sometimes referred to as a
Loop ID.

Major Event Log

A more detailed logging method implemented on HP08 and later firmware. Major event
logging requires that the UTM be enabled.

MIA

Media interface adapter, a device that allows you to connect fiber optic cable to a
copper wire connector.

mirrored disks

A mirrored disk is an exact copy of another disk. Mirrored disk are used when
implementing the data redundancy technique of mirroring. See mirroring.

mirroring

A technique which creates data redundancy by maintaining a duplicate copy of all data
stored on the disk array. The mirror copy of data is available if the disk containing the
original data fails or becomes inaccessible. RAID 1 and RAID 0/1 LUNs use mirroring.