Disk group versions


Disk group versions
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All disk groups have a version number associated with them. Each major Veritas Volume Manager (VxVM) release introduces a disk group version. To support the new features in the release, the disk group must be the latest disk group version. By default, VxVM creates disk groups with the latest disk group version. For example, Veritas Volume Manager 6.0 creates disk groups with version 170.

Each VxVM release supports a specific set of disk group versions. VxVM can import and perform operations on a disk group of any supported version. However, the operations are limited by what features and operations the disk group version supports. If you import a disk group from a previous version, the latest features may not be available. If you attempt to use a feature from a newer version of VxVM, you receive an error message similar to this:

VxVM vxedit ERROR V-5-1-2829 Disk group version doesn't support
feature

You must explicitly upgrade the disk group to the appropriate disk group version to use the feature.

Table: Disk group version assignments summarizes the Veritas Volume Manager releases that introduce and support specific disk group versions. It also summarizes the features that are supported by each disk group version.

Table: Disk group version assignments

VxVM release	Introduces disk group version	New features supported	Supports disk group versions *
7.0, 6.2	200	Atomic Write I/O support SmartIO support for shared volumes	20, 30, 40, 50, 60, 70, 80, 90, 110, 120, 130, 140, 150, 160, 170, 180, 190
6.1	190	SmartIO caching Flexible storage sharing CVM enhancements	20, 30, 40, 50, 60, 70, 80, 90, 110, 120, 130, 140, 150, 160, 170, 180
6.0.1	180	TRIM support for Solid State Devices (SSDs) CVM availability enhancements	20, 30, 40, 50, 60, 70, 80, 90, 110, 120, 130, 140, 150, 160, 170
6.0	170	VVR compression VVR Secondary logging CVM availability enhancements DCO version 30 Recovery for synchronization tasks.	20, 30, 40, 50, 60, 70, 80, 90, 110, 120, 130, 140, 150, 160
5.1SP1	160	Automated bunker replay as part of GCO failover Ability to elect primary during GCO takeover CVM support for more than 32 nodes and up to 64 nodes CDS layout support for large luns (> 1 TB) vxrootadm enhancements	20, 30, 40, 50, 60, 70, 80, 90, 110, 120, 130, 140, 150, 160
5.1	150	SSD device support, migration of ISP dg	20, 30, 40, 50, 60, 70, 80, 90, 110, 120, 130, 140, 150
5.0	140	Data migration, Remote Mirror, coordinator disk groups (used by VCS), linked volumes, snapshot LUN import.	20, 30, 40, 50, 60, 70, 80, 90, 110, 120, 130, 140
5.0	130	VVR Enhancements	20, 30, 40, 50, 60, 70, 80, 90, 110, 120, 130
4.1	120	Automatic Cluster-wide Failback for A/P arrays Persistent DMP Policies Shared Disk Group Failure Policy	20, 30, 40, 50, 60, 70, 80, 90, 110, 120
4.0	110	Cross-platform Data Sharing (CDS) Device Discovery Layer (DDL) 2.0 Disk Group Configuration Backup and Restore Elimination of rootdg as a Special Disk Group Full-Sized and Space-Optimized Instant Snapshots Intelligent Storage Provisioning (ISP) Serial Split Brain Detection Volume Sets (Multiple Device Support for VxFS)	20, 30, 40, 50, 60, 70, 80, 90, 110
3.2, 3.5	90	Cluster Support for Oracle Resilvering Disk Group Move, Split and Join Device Discovery Layer (DDL) 1.0 Layered Volume Support in Clusters Ordered Allocation OS Independent Naming Support Persistent FastResync	20, 30, 40, 50, 60, 70, 80, 90
3.1.1	80	VVR Enhancements	20, 30, 40, 50, 60, 70, 80
3.1	70	Non-Persistent FastResync Sequential DRL Unrelocate VVR Enhancements	20, 30, 40, 50, 60, 70
3.0	60	Online Relayout Safe RAID-5 Subdisk Moves	20, 30, 40, 60
2.5	50	SRVM (now known as Veritas Volume Replicator or VVR)	20, 30, 40, 50
2.3	40	Hot-Relocation	20, 30, 40
2.2	30	VxSmartSync Recovery Accelerator	20, 30
2.0	20	Dirty Region Logging (DRL) Disk Group Configuration Copy Limiting Mirrored Volumes Logging New-Style Stripes RAID-5 Volumes Recovery Checkpointing	20
1.3	15		15
1.2	10		10

* To support new features, the disk group must be at least the disk group version of the release when the feature was introduced.

If you need to import a disk group on a system running an older version of Veritas Volume Manager, you can create a disk group with an earlier disk group version.