HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software Command Line Interface Reference Guide (EK-G80CL-RA. C01, March 2005)

CLI Command Descriptions
60 HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software
Command Line Interface Reference Guide
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. Refer to the OS solution kit for more details.
SCSI persistent reservations are processed differently by HSG60 and HSG80
array controllers based upon the RESERVATION_STYLE. Normal SCSI
reservations (not persistent) are always treated as CONNECTION_BASED.
■ Specify HBA_PORT_ID_BASED to propagate a single persistent
reservation command to all HSG80 array controller ports; thereby,
enabling the host to access the unit over any available path.
■ Specify CONNNECTION_BASED to make the persistent reservation valid
for the port on which it is received; thereby, limiting the host access to
those paths that are explicitly reserved.
Note: 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 array controllers
in a storage area network (SAN) environment.
UNIT_OFFSET=n
Specifies the 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.
Note: Setting unit offsets requires a Windows NT 4.0 host reboot (reboot -r) for the
newly set offsets to take effect. Windows 2000 and Windows Server 2003 require a
disk rescan.
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.