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

• Fibre Channel switches
Even though the interface is Fibre Channel, this guide uses the term "SCSI disk" because disk array
devices are defined to the host as SCSI disks.

Device emulation types

The XP family of disk arrays supports 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 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 7

Failover

The disk arrays support many standard software products that provide host, application, or I/O path
failover and management.

SNMP configuration

The XP family of disk arrays 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. Refer to the applicable user's guide for procedures.
12 Installing and configuring VMware for the XP disk array
on page 32 for detailed information.