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Operating Systems AIX Difference between lpar and lun Post 302876248 by ibmtech on Friday 22nd of November 2013 12:24:52 PM
Old 11-22-2013
To answer it in simple way

An LPAR (Logical Partition) is a virtual server.

A LUN (Logical Unit Number) is a disk (it can be carved out of many physical disks). The term is use by Storage Admins, but when it is mapped to a particular LPAR, the System Admins, DBA and Application team call it a disk, we also call disk a LUN.
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mpioutil(1)						    BSD General Commands Manual 					       mpioutil(1)

NAME
mpioutil -- Tool for configuring paths to multipathed logical units. SYNOPSIS
mpioutil verb direct-object arguments DESCRIPTION
mpioutil is a utility to manage multiple paths to a SCSI Logical Unit. VERBS, DIRECT OBJECTS, AND SPECIFIC ARGUMENTS list Lists all multipathed logical units. info -i <lun identifier> Get information on a multipathed logical unit. The -i flag may also be expressed as --id. modify lun -i <lun identifier> -a <load balancing algorithm> -b <round robin batch count> Modify a logical unit. The -i, -a, -b flags may also be expressed as --id, --algorithm, and --batchCount respectively. modify path -l <lun identifier> -i <path identifier> -e | -d Modify a path on a logical unit. The -l, -i, -e, and -d flags may also be expressed as --lun, --id, --enable, and --disable respec- tively. EXAMPLES
mpioutil list Lists all multipathed logical units. mpioutil info --id 22F2000155A508ED Get information for a multipathed lun with id 22F2000155A508ED. mpioutil modify lun --id 22F2000155A508ED --algorithm RoundRobin --batchCount 16 Modify a multipathed lun's algorithm to be RoundRobin with a batch count of 16. mpioutil modify lun --id 22F2000155A508ED --algorithm LeastIO Modify a multipathed lun's algorithm to be LeastIO. mpioutil modify path --lun 22F2000155A508ED --id 26010001553560BF00000001 --disable Disable a path that belongs to a multipathed logical unit. Darwin May 31, 2019 Darwin
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