VERITAS Storage Foundation 4.1 Cross-Platform Data Sharing Administrator's Guide

Converting a Non-CDS Disk Group to a CDS Disk Group
16 VERITAS Storage Foundation CDS Administrator’s Guide
Please refer to the vxcdsconvert(1M) manual page for information on options, attributes, and
keywords.
Notes
◆ A non-CDS disk group will be upgraded (using the vxdg upgrade command). Also, if the disk
group was originally created by the conversion of an LVM Volume Group (VG), then rolling
back to the original LVM VG is not an option. If you decide to go through with the conversion,
the rollback records for the disk group will be removed, so that an accidental rollback to an
LVM VG cannot be done.
◆ If the non-CDS disk group has one or more disks that are not CDS disks, these disks are
converted to CDS disks. If you do not want one or more of these disks to be converted, you
need to move them out of the disk group (for example, using vxdg move or split) prior to
invoking the vxcdsconvert group command.
◆ If the non-CDS disk group does not have a CDS-compatible disk group alignment, the objects
need to go through relayout, so they have a CDS-compatible alignment.
◆ Unless the novolstop option is specified, applications using disks which require format
conversion must be terminated for the duration of the disk conversion process.
◆ Use of the novolstop option for the disk conversion piece may add a large amount of work,
as objects may need to be evacuated and then unrelocated back.
Examples
◆ Check if the disk group mydg and all its disks can be made portable, using the command:
# vxcdsconvert -g mydg -A group
◆ Make the disk group mydg and all its disks portable while its volumes are still online. You can
avoid using the novolstop option during disk conversion by using the following sequence
of commands:
◆ Stop all applications that are using volumes on the disks requiring format conversion.
◆ Enter the command:
# vxcdsconvert -g mydg alldisks
◆ Restart applications.
◆ Enter the command:
# vxcdsconvert -g mydg group
◆ Make the disk group, anodg, and all its disks, portable while its volumes are still online, and
allow subdisks to be evacuated to disks anodg11 through anodg14 if required: