Creating and administering disk groups 209

Upgrading a disk group

becomes incompatible with earlier releases of VxVM that do not support the new version.

Before the imported disk group is upgraded, no changes are made to the disk group to prevent its use on the release from which it was imported until you explicitly upgrade it to the current release.

Until completion of the upgrade, the disk group can be used “as is” provided there is no attempt to use the features of the current version. Attempts to use a feature of the current version that is not a feature of the version from which the disk group was imported results in an error message similar to this:

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

To use any of the new features, you must run the vxdg upgrade command to explicitly upgrade the disk group to a version that supports those features.

All disk groups have a version number associated with them. Veritas Volume Manager releases support a specific set of disk group versions. VxVM can import and perform operations on a disk group of that version. The operations are limited by what features and operations the disk group version supports.

The table, “Disk group version assignments,” summarizes the Veritas Volume Manager releases that introduce and support specific disk group versions:

Table 4-1

Disk group version assignments

 

 

 

 

VxVM release

Introduces disk group version

Supports disk group versions

 

 

 

1.2

10

10

 

 

 

1.3

15

15

 

 

 

2.0

20

20

 

 

 

2.2

30

30

 

 

 

2.3

40

40

 

 

 

2.5

50

50

 

 

 

3.0

60

20-40, 60

 

 

 

3.1

70

20-70

 

 

 

3.1.1

80

20-80

 

 

 

3.2, 3.5

90

20-90

 

 

 

4.0

110

20-110

 

 

 

4.1

120

20-120

 

 

 

5.0

140

20-140