HP StorageWorks Disk Array XP operating system configuration guide for Tru64 UNIX XP24000, XP12000, XP10000, v01 (A5951-96066, June 2007)

Device emulation types
The XP family of disk arrays supports these device emulation types:
• OPEN-x devices: OPEN-x logical units represent disk devices. Except for OPEN-V, these devices
are based on fixed sizes. OPEN-V is a user-defined size. Supported emulations include OPEN-3,
OPEN-8, OPEN-9, OPEN-E, OPEN-L, and OPEN-V devices.
• LUSE devices (OPEN- x * n ): Logical Unit Size Expansion (LUSE) devices combine 2 to 36
OPEN-x devices to create expanded LDEVs larger than standard OPEN-x disk devices. For example,
an OPEN-x LUSE volume created from ten OPEN-x volumes is designated as OPEN-x*10.
• CVS devices (OPEN-x CVS): Volume Size Configuration (VSC) defines custom volumes (CVS) that
are smaller than normal fixed-sized logical disk devices (volumes). (OPEN-V is a CVS-based custom
disk size that you determine. OPEN-L does not support CVS.)
• LUSE (expanded) CVS devices (OPEN-x*n CVS): LUSE CVS combines CVS devices to create an
expanded device. This is done by first creating CVS custom-sized devices and then using LUSE to
combine from 2 to 36 CVS devices. For example, if three OPEN-9 CVS volumes are combined to
create an expanded device, this device is designated as OPEN-9*3-CVS.
Refer to “Emulation specifications ” on page 34 for detailed information.
Failover
The XP family of disk arrays supports many standard software products that provide host, application,
or I/O path failover and management. TruCluster is one of the supported applications.
CAUTION:
Tru64 5.1B and later fully support dynamic load balancing and failover when multiple HBAs are connected
to the same LUN. This feature is ONLY available with version 5.1B and later.
SNMP configuration
The XP family of disk arrays supports standard Simple Network Management Protocol (SNMP) for
remotely managing the disk array. The SNMP agent on the SVP performs error-reporting operations
requested by the SNMP manager. SNMP properties are usually set from the SVP but they can also
be set remotely using XP Remote Web Console, or XP Command View. For procedures, refer to the
applicable user guide available at:
http://www.hp.com/support/manuals.
Installing and configuring Tru64 for the XP disk array12