Veritas Storage Foundation 5.1 SP1 Advanced Features Administrator"s Guide (5900-1503, April 2011)

Moving objects between CDS disk groups and non-CDS disk
groups
The alignment of a source non-CDS disk group must be 8K to allow objects to be
moved to a target CDS disk group. If objects are moved from a CDS disk group to
a target non-CDS disk group with an alignment of 1, the alignment of the target
disk group remains unchanged.
To move objects between a CDS disk group and a non-CDS disk group
■ Use the vxdg move command to move objects between a CDS disk group and
a non-CDS disk groups.
See the Veritas Volume Manager Adminstrator’s Guide.
Moving objects between CDS disk groups
The disk group alignment does not change as a result of moving objects between
CDS disk groups.
To move objects between CDS disk groups
■ Use the vxdg move command to move objects between CDS disk groups.
See the Veritas Volume Manager Adminstrator’s Guide.
Joining disk groups
Joining two CDS disk groups or joining two non-CDS disk groups is permitted, but
you cannot join a CDS disk group to a non-CDS disk group. If two non-CDS disk
groups have different alignment values, the alignment of the resulting joined disk
group is set to 1, and an informational message is displayed.
To join two disk groups
■ Use the vxdg join command to join two disk groups.
See the Veritas Volume Manager Adminstrator’s Guide.
Changing the default CDS setting for disk group creation
To change the default CDS setting for disk group creation
■ Edit the /etc/default/vxdg file, and change the setting for the cds attribute.
Creating non-CDS disk groups
A disk group with a version lower than 110 is given an alignment value equal to
1 when it is imported. This is because the dg_align value is not stored in the
configuration database for such disk groups.
To create a non-CDS disk group with a version lower than 110
477Migrating data between platforms
Maintaining your system