Novell LINUX ENTERPRISE SERVER 10 - INSTALLATION AND ADMINISTRATION 11-05-2007 Installation Manual page 136

partitioning. It shows the existing physical volumes and logical volumes in two lists
and you can manage your LVM system using the methods already described.
7.1.3 Storage Management with EVMS
The Enterprise Volume Management System 2 (EVMS2) is a rich, extensible volume
manager with built-in cluster awareness. Its plug-in framework allows plug-ins to add
functionality for support and knowledge of any partition type. Being cluster-aware,
EVMS2 guarantees that managed devices are named identically on each node in the
cluster for easier management.
EVMS2 provides a unified interface (evmsgui and command line) for managing the
following storage resources:
• Physical disks and logical devices on local media and SAN-based media, including
iSCSI
• Software RAIDs 0, 1, 4, and 5 for high availability
• Cluster-aware multipath I/O for fault tolerance
• Cluster storage objects with the Cluster Segment Manager (CSM) plug-in
• Volumes for all file systems that have a file system interface module (FSIM) for
EVMS2
• Snapshots of volumes
In SUSE Linux Enterprise Server 10, new features include the following:
• EVMS2 and CLVM2 (Cluster Linux Volume Manager 2) use the same multidisk
(MD) drivers and device mapper (DM) drivers in the kernel.
• File system plug-ins are available for Heartbeat 2 Cluster Manager and Oracle
Cluster File System 2.
EVMS Devices
The EVMS Administration Utility distinguishes five different levels of devices:
118 Installation and Administration