Hp XP12000 User Manual download pdf (Page 16)

18 HP StorageWorks Disk Array XP Operating System Configuration Guide: HP-UX

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)

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Hp XP12000 User Manual Page 16