HP-UX 11i v3 Native Multi-Pathing for Mass Storage (August 2012)

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Glossary
Agile Addressing
The ability to address a logical unit with the same DSF regardless of the location of the LUN, that
is, the device file for a LUN remains the same even if the LUN is moved from one Host Bus
Adapter (HBA) to another, from one switch or hub port to another, or presented via a different
target port to the host. The LUN device file stays the same even if the N-Port ID of the target port
changes in the case of Fibre Channel LUNs.
Agile Naming Model
DSF naming model introduced in 11i v3 to support agile addressing.
Agile View of the I/O Tree
View of the I/O tree using agile addressing to represent elements of the I/O tree.
DSF
Device Special File
EVM
Event Management System
Hard Partition
Feature part of the HP Partitioning Continuum for HP-UX 11i on HP 9000 and HP Integrity servers.
(Complete documentation available at
http://www.hp.com).
Hardware Path (H/W Path)
A series of numbers representing the physical or virtualized location of a device. Before 11i v3,
the hardware path contained a maximum of 14 elements of 8 bits each. Starting with 11i v3, the
hardware path contains up to 64 elements of 64 bits each.
HBA
Host Bus Adapter
I_T nexus
Defined by the T10 SAM standard as a nexus between a SCSI initiator port and a SCSI target
port.
I_T_L nexus
Defined by the T10 SAM standard as a nexus between a SCSI initiator port, a SCSI target port,
and a LUN.Profile
Legacy DSF
A lunpath dependent DSF that follows the legacy naming model conventions, in which the DSF
embeds the bus/target/lun/option for a specific lunpath to a mass storage device (for example,
/dev/dsk/c#t#d#).
Legacy H/W Path