User`s guide

• LUN and Logical LUN—Again, the term LUN refers to two different
entities in a HSZ40 controller environment, the host side bus LUN and the
device side bus LUN.
Host Side LUN—This entity is part of the HSZ40 UNIT Designator. It is used
by the host operating system to identify a unique HSZ40 unit.
Device Side LUN—In current HSOF versions, this LUN is always 0. The
device side Target ID and the Port number are the only entities that are
currently used by the HSZ40 controller to identify a unique device on the
device side SCSI Bus.
8.7 Specific Procedures
The host side SCSI bus is the SCSI bus that connects the HSZ40 controller to the
host system adapter. It has a SCSI bus number that depends upon the physical
I/O location of the SCSI host adapter. This SCSI bus number can be determined
from the DEC OSF/1 uerf utility, by entering the following DEC OSF/1 command:
uerf -R -o full -r 300 | more
Example 8–8 SCSI Bus Number Determination
****************************** ENTRY 21. *********************************
----- EVENT INFORMATION -----
EVENT CLASS OPERATIONAL EVENT
OS EVENT TYPE 300. SYSTEM STARTUP
SEQUENCE NUMBER 0.
OPERATING SYSTEM DEC OSF/1
OCCURRED/LOGGED ON Tue Jan 31 17:34:56 1995
OCCURRED ON SYSTEM bellyup
SYSTEM ID x00000009 CPU TYPE: DEC 2100
SYSTYPE x00000000
MESSAGE Alpha boot: available memory from
_0xbd2000 to 0xfffe000
DEC OSF/1 T3.2-4 (Rev. 185); Tue Jan
_24 17:31:18 EST 1995
physical memory = 256.00 megabytes.
available memory = 235.58 megabytes.
using 975 buffers containing 7.61
_megabytes of memory
Firmware revision: 3.9
PALcode: OSF version 1.35
ibus0 at nexus
AlphaServer 2100 4/200
cpu 0 EV-4s 1mb b-cache
gpc0 at ibus0
pci0 at ibus0
scsi0 at psiop0
rz0 at scsi0 bus 0 target 0 lun 0 (DEC
_ RZ28 (C) DEC T436)
pza0 at pci0 slot 7
scsi2 at pza0
rz18 at scsi2 bus 2 target 2 lun 0
_(DEC HSZ40 (C) DEC V20Z)
***************************************************************************
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8–28 Operating System Support