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.
Failover
The XP family of disk arrays supports 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)
