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

To verify whether a non-CDS disk group can be converted to a CDS disk group,
type the following command:
# vxcdsconvert -g diskgroup -A group
3
If the disk group does not have a CDS-compatible disk group alignment, the
objects in the disk group must be relayed out with a CDS-compatible
alignment.
4
If the conversion is not going to be performed on-line (that is, while access
to the disk group continues), stop any applications that are accessing the
disks.
5
Type one of the following forms of the CDS conversion utility (vxcdsconvert)
to convert a non-CDS disk group to a CDS disk group.
# vxcdsconvert -g diskgroup [-A] [-d defaults_file] \
[-o novolstop] alignment [attribute=value] ...
# vxcdsconvert -g diskgroup [-A] [-d defaults_file] \
[-o novolstop] group [attribute=value] ...
The alignment and group keywords have the following effect:
Specifies alignment conversion where disks are not converted,
and an object relayout is performed on the disk group. A
successful completion results in an 8K-aligned disk group. You
might consider this option, rather than converting the entire
disk group, if you want to reduce the amount of work to be done
for a later full conversion to CDS disk group.
alignment
Specifies group conversion of all non-CDS disks in the disk group
before relaying out objects in the disk group.
group
The conversion involves evacuating objects from the disk, reinitializing the
disk, and relocating objects back to disk. You can specify the -o novolstop
option to perform the conversion on-line (that is, while access to the disk
group continues). If the -o novolstop option is not specified, stop any
applications that are accessing the disks, and perform the conversion off-line.
Warning: Specifying the -o novolstop option can greatly increase the amount
of time that is required to perform conversion.
Conversion has the following side effects:
469Migrating data between platforms
Setting up your system