HP storageworks HSG80 Reference Manual page 25

Specifies the operating system of the host. The OPERATING_SYSTEM switch
tailors the controller's behavior for use with a particular operating system. See
your operating system specific Solution Kit to determine which value should be
used. The following values are supported: WINNT, TRU64_UNIX, VMS, HP,
HP_VSA, IBM, NETWARE, SGI, SNI, SUN, AIX_CAMBEX.
RESERVATION_STYLE=CONNECTION_BASED (default)
RESERVATION_STYLE=HBA_PORT_ID_BASED
Selection of a RESERVATION_STYLE should be based upon the capabilities of
the host operating system. See the OS kit for more details. SCSI persistent
reservations are processed differently by the HSG80 based upon the
RESERVATION_STYLE. Normal SCSI reservations (not persistent) are always
treated as CONNECTION_BASED.
When set to HBA_PORT_ID_BASED, a single persistent reservation command is
propagated to all HSG80 controller ports, thereby enabling the host to access the
unit over any available path.
When set to CONNNECTION_BASED, the persistent reservation is only valid for
the port on which it is received, thereby limiting the host access to those paths that
have been explicitly reserved.
IMPORTANT: If a particular host prefers either the CONNECTION_BASED or
HBA_PORT_ID_BASED reservation style, all the connections to that particular host must
have identical reservation style settings.
The most important advantage of this mechanism is that it allows various hosts, with
different reservation style requirements, to be connected to the same HSG80 controllers in
a SAN environment.
UNIT_OFFSET=n
UNIT_OFFSET is a decimal value (n) that establishes the beginning of the range
of units that a host connection can access. This offset defines and restricts host
connection access to a contiguous group of unit numbers.
In transparent failover mode, host connections on port 1 default to an offset of 0;
port 1 connections can see units 0 through 99. Host connections on port 2 default
to an offset of 100; port 2 connections can see units 100 through 199.
In multiple-bus failover mode, the default offset is 0 for all host connections.
NOTE: If a controller pair is switched from transparent failover mode to multiple-bus
failover mode, the unit offsets for transparent mode remain in effect.
The LUN number equals the unit number minus the offset:
LUN number = unit number – offset
HSG80 Array Controller V8.7 Command Line Interface Reference Guide
ADD CONNECTIONS
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