VERITAS Volume Manager 4.1 Release Notes (5900-0591, March 2010)

VERITAS Volume Manager 4.1 Release Notes
New Features in VERITAS Volume Manager 4.1
Chapter 110
— Base-VXVM now supports persistent device names. The disk names, once assigned,
will remain constant across reconfiguration and rebooting.
— Device discovery is now multithreaded. Performance improvements have also been
made to DMP.
• Multi-Device Support
Multi-Device Support allows several volumes to be represented by a single logical object.
All I/O to and from the underlying logical volume is directed via the I/O interfaces of the
volume sets. This feature is designed primarily for the multi-device file system
enhancement for VERITAS File System.
• 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. This applies only to
Base-VXVM configuration data and does not apply to user and application data.
• 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. Please refer VERITAS
Storage Foundation Cross-Platform Data Sharing Administrator’s Guide for more
information. CDS doesnot support VERITAS Volume Replicator (VVR).
• 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.
• Storage Expert
System Administrators sometimes find that gathering and interpreting data about large
and complex configurations can be a difficult task. Consisting of a set of simple commands
that collect and analyse Base-VXVM configuration data, Storage Expert produces a
summary report that recommends configuration improvements.
• Detecting and correcting the Serial Brain Split Condition in a Disk Group
Under certain circumstances a serial split brain condition can occur in a disk group where
the actual serial numbers on disks are different from those listed in the configuration
database copies on the disks. To recover from such a situation, you can use the
vxsplitlines command to diagnose the problem. This command also details the
commands that you can use to correct the condition.
• Online Node Addition
Base-VXVM now allows you to add a node to a cluster dynamically.