scsimgr SCSI Management and Diagnostics utility on HP-UX 11i v3 (March 2008)

Abstract
This paper presents the scsimgr command introduced with HP-UX 11i v3 to provide SCSI
management and diagnostics. scsimgr significantly enhances management and troubleshooting
capabilities of the mass storage subsystem. This paper provides an overview of its features, its general
syntax and examples showing how to use the command to accomplish some specific tasks.
Terms and definitions
Agile Addressing The ability to address a LUN with the same DSF regardless of the location
of the LUN, i.e. the device file for a LUN remains the same even if the
LUN is moved from one HBA to another, from one switch/hub port to
another or presented via a different target port to the host.
Agile naming model DSF naming model introduced in HP-UX 11i v3 to support agile
addressing.
DSF Device special file.
Legacy DSF A path dependent DSF following the legacy naming model conventions,
wherein the DSF embeds the bus/target/ LUN/option for a specific path
to a mass storage device (Ex. /dev/dsk/c#t#d#).
Legacy Hardware
Path
Hardware path in the legacy format. Used for all components, mass
storage or not.
Legacy naming
model / legacy
format
DSF format convention used prior to HP-UX 11i v3. This model is
maintained in HP-UX 11i v3 for backward compatibility.
LUN Logical unit that refers to an end storage device such as disk, tape,
floppy, cdrom, changer, and so forth. This is the logical unit itself and
does not represent the path to the logical unit.
LUN id The SCSI address of the LUN within the target as defined in the SCSI
standard.
lunpath I/O path to a LUN in agile format.
Persistent DSF DSF following the persistent naming model conventions. Does not contain
any encoding of bus, target identifier or device-specific option
information.
SCSI class driver A HP-UX device driver which manages one or more specific classes of
mass storage devices. Ex: Disk Driver, Tape Driver, Changer Driver, Pass-
through Driver.
Target Id The target port identifier as defined in SCSI transport protocols.
WWID SCSI Logical Unit World Wide identifier obtained from EVPD INQUIRY
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