Enterprise Volume Manager (Multi-OS) Version 2.0D Network Administration Guide

8–2 Enterprise Volume Manager (Multi-OS) Network Administration Guide
EVM Support for Volume Groups and HP Tru64 UNIX AdvFS Domains
• All storage must be visible to the Management Appliance.
IMPORTANT: HP strongly recommends installing an identical ACS or VCS version level on
all HSG-based or HSV-based storage systems, respectively, in an EVM network that uses
volume grouping.
• A VCS snapshot license to use EVM with an HSV-based system.
• EVM must find free disks on the same storage system as the source disks (a
one-to-one match) for clone and snap operations of UNIX volume groups and
domains that span multiple storage systems.
• EVM must find adequate space in the HSV disk group when creating a BCV on an
HSV-based system. The type of BCV created (fully allocated snapshot, demand
allocated snapshot, or snapclone) determines the amount of free space needed.
Refer to the online Help/User Guide for detailed explanations of the HSV
replication operations.
NOTE: A demand allocated snapshot is also called a Vsnap.
Volume Group and Domain Configurations
The HP interpretation of volume groups and domains includes a configuration that can
consist of multiple HSG-based or HSV-based storage systems and multiple units. Each
volume group or domain is referenced by a single name and consists of physical
volumes. A logical volume or fileset is a subset of the volume group or domain and is
mountable.
NOTE: The fewer the physical volumes (units) that comprise a volume group or domain, the
faster and more efficient the EVM job becomes.
IMPORTANT: EVM V2.0D does not support volume grouping in Windows 2000 or Windows NT
environments.
Supported and Unsupported Volume Groups and Domains
EVM V2.0D supports any volume group or domain that has all physical volumes on
an HSG-based or HSV-based storage system that EVM can access (visible through the
Management Appliance).
EVM V2.0D does not support the following: