Device Emulation Types; Failover; Snmp Configuration - HP StorageWorks XP24000 Configuration Manual

Device emulation types

The XP family of disk arrays and the SVS200 support these device emulation types:
• OPEN-K/3/8/9/E 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-K/3/8/9/E 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.
NOTE:
For the SVS200, and the XP24000/XP12000/XP10000 when connected to external storage devices, HP
recommends using OPEN-V as the emulation the array makes visible to the host. This allows configuration
of external storage LDEVs without losing data. Using any other emulation may cause data loss in the
external storage LUNs.
Refer to Table 11

Failover

The disk arrays support many standard software products that provide host, application, or I/O path
failover and management.
The following are supported for HP-UX:
• HP Multi-Computer/ServiceGuard (MC/ServiceGuard) software for application failover
• Alternate link for I/O path failover (included in HP-UX)
• Logical volume management (included in HP-UX)

SNMP configuration

The XP family of disk arrays and the SVS200 support standard Simple Network Management Protocol
(SNMP) for remotely managing arrays. 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, XP Command View (XP arrays only), or Command
View XP Advanced Edition Software. Refer to the applicable user's guide for procedures.
12 Installing and configuring HP-UX for the XP disk array
on page 39 for detailed information.