May 24, 2013 · LUN mapping determines which LUNs are available in a front end port, LUN masking determines which hosts can see which LUNs. For example, you can assign 20 LUNs to a front end port, and then allow 1 host to see 10 of them and another host to see the remaining 10.

Availability: This command is available to cluster and Vserver administrators at the admin privilege level. This command maps a LUN to all of the initiators in an initiator group (igroup). After you map the LUN, the LUN is visible to all initiators in the igroup.

LUNs can be used for zoning and masking in SANs or they can be virtualized to map multiple physical LUNs. Although the term LUN is only the identifying number of the logical unit, it is commonly used as shorthand to refer to the logical unit itself.

May 26, 2009 · In simple terms, a logical unit number (LUN) is a slice or portion of a configured set of disks that is presentable to a host and mounted as a volume within the OS.

Selects the LUN maps for the LUN with the path that matches the parameter value. Examples of correct LUN paths: /vol/vol1/lun1 and /vol/vol1/qtree1/lun1 | [-volume <volume name>] - Volume Name

Apr 3, 2025 · A LUN map is an association between a LUN and an initiator group. When a LUN is mapped to an initiator group, the initiator group's initiators are granted access to the LUN. The relationship between a LUN and an initiator group is many LUNs to many initiator groups.

When there are multiple paths between a SCSI initiator and SCSI target, multi-pathing software is used to properly map target volumes via both the paths. Storage controllers provide access control mechanisms (LUN Masking) that can control how initiators access target storage volumes.

Dec 28, 2007 · So when you "map" a device on the frontend you allow the port (the processor) of the storage to "see" the device inside the storage, while when you "mask" the device to a given WWN you allow this specific host to see the device through a …

Jul 20, 2022 · Logical Unit Number (LUN) Masking is process that grants control of data access by specifying LUNs which can be accessed by computer system. It is usually performed at Host Bus Adapter (HBA) level. Storage subsets are created by LUN masking within Virtual SAN where only identified servers are authorized to access these subsets.

Jul 10, 2023 · In this tutorial, we’ll show you how to check LUN presented from SAN with underlying OS disk, LV Name, VG Name and associated Filesystem on Linux.