Fibre Channel Interface; Device Emulation Types - HP XP20000/XP24000 Configuration Manual

HP StorageWorks XP Remote Web Console or HP StorageWorks P9000 or XP Command View
Advanced Edition Software for configuring disk array ports and paths.
HP StorageWorks XP Array Manager.
Check with your HP representative for other XP software available for your system.

Fibre Channel interface

The XP family of disk arrays and the SVS 200 support the following Fibre Channel elements:
Connection speeds of 1 Gbps, 2 Gbps, and 4 Gbps.
Short-wave non-OFC (open fibre control) optical interface
Multimode optical cables with SC or LC connectors
Public or private arbitrated loop (FC-AL) or direct fabric attach
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 and the SVS 200 support 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 based on a CVS device. 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.) Although OPEN-V is a CVS-based
device, the product name in the SCSI inquiry string is OPEN-V opposed to the fixed size OPEN-
[389E] devices that appear as OPEN-x-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. OPEN-V devices are
designated as OPEN-V*n (without CVS).
FX Devices (3390-3A/B/C, OPEN-x FXoto): The Data Exchange feature allows you to share data
across mainframe, UNIX, and PC server platforms using special multi-platform volumes. The VLL
feature can be applied to DE devices for maximum flexibility in volume size.
NOTE:
For the SVS 200, and the XP24000/XP20000/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
might cause data loss in the external storage LUNs. For new deployments, use OPEN-V, because
some features (such as HP StorageWorks XP Snapshot Software or HP StorageWorks XP Continuous
Access Journal Software) are only supported with OPEN-V.
8 Installing and configuring Solaris for the XP family of disk arrays