HP-UX 11i Version 2 December 2005 Release Notes

Disk and File Management
VERITAS Volume Manager (VxVM)
Chapter 6
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— Multi-Device Support: Multi-Device Support allows several volumes to be
represented by a single logical object.
— Configuration Backup and Restore Support: Configuration Backup and Restore
support allows you to backup and restore or replicate all Base-VXVM
configuration data for disk groups and volumes.
— Cross-Platform Data Sharing Feature (CDS): CDS allows the sharing of data
between heterogeneous systems where each system has direct access to the
physical devices that are used to hold the data.
— Hitachi Extended Copy Facility: The Hitachi E-Copy facility allows a host server
to request data movement from disk to tape or to another disk without the
overhead of server CPU time I/O during the actual movement of data.
— Base-VXVM now allows you to add a node to a cluster dynamically.
— With this release, VxVM provides support for installation through a
menu-driven frontend.
— Enhancement of Local Detach Policy: Local detach policy now works uniformly
on both master and slave nodes in a cluster.
— Default Disk Group Behavior in Base-VXVM 4.1
In previous versions of VxVM, a disk group with the name rootdg (root disk
group) was required. For VxVM to function, the rootdg disk group had to exist,
and it had to contain at least one disk. This requirement no longer exists;
however you might find it convenient to create a system-wide default disk group.
— Simplification of vxinstall
Because Base-VXVM no longer requires a rootdg to be configured; vxinstall
has been much simplified, and you can no longer use this command to configure
disk groups on your system after installation. You should now use vxdiskadm or
the VERITAS Enterprise Administrator.
— The Base-VXFS 4.1 release supports a new disk layout (version 5) that enables
the creation of file systems up to 32 terabytes in size.
• Full VxVM (includes all base features, plus the following)
— The Intelligent Storage Provisioning (ISP) Service is an alternative to the
traditional method of creating and managing volumes.
— Enhancements to Device Discovery Layer (DDL):
— Dynamic discovery of disks or their attributes
— Allowing Dynamic Multipathing (DMP) kernel extensions to support
multipathing and/or load balancing in a configuration that is specific to a
particular disk array.
— Previous releases of VxVM supported two naming schemes, OS-Native
Scheme and Enclosure-based Naming. Although VxVM provided the means
of changing between the two schemes dynamically, it was necessary to
restart vxconfigd which is a time-consuming operation. With this release,
the vxconfigd restart operation is no longer necessary.
— Dynamic Multipathing Enhancements:
— Coexistence of DMP with third-party drivers