NAME
vxvmconvert — convert LVM volume groups to VxVM disk groups
DESCRIPTION
vxvmconvert is a menu-driven program to convert an HP Logical
Volume Manger (LVM) configuration to a VERITAS Volume Manager
configuration. This man page is a brief overview of
vxvmconvert. Refer to the VERITAS Volume Manager Migration
Guide for a detailed description before using the conversion
procedure.
The vxvmconvert script is interactive and prompts you
for responses, supplying defaults where appropriate.
There is a Help facility at every prompt.
Enter a question mark (?) at a prompt to display a
context-sensitive help message.
With vxvmconvert you can identify LVM volume groups, list disks,
analyze volume groups for conversion and complete the conversion of LVM
volume groups to VxVM disk groups.
LVM configurations are converted at the volume group level. All disks
used in a volume group are converted together. You cannot use
vxvmconvert to convert unused LVM disks (those not part of an LVM
volume group) to VxVM disks. To convert unused LVM disks,
use pvremove to take the disk out of LVM control,
then initialize the disk for VxVM use by using vxdiskadm
(see
pvremove(1M)
and
vxdiskadm(1M)
for more information).
vxvmconvert changes disks within LVM volume groups to VxVM disks
by replacing the areas of the disks used for LVM configuration
information and with the equivalent VxVM volume configuration
information. Portions of the disks used for user data, such as file
systems and databases, are not affected by the conversion.
The conversion process changes the names by which your system refers to
the logical storage, so must be done offline. No applications can
access data in the volume groups undergoing conversion. You must
unmount file systems using those volumes and shut down any applications,
such as databases, that might use the volumes directly.
OPERATIONS
- Analyze LVM Volume Groups for Conversion
Use this operation to analyze one or more LVM volume groups for
conversion to use by VxVM. The analysis checks for problems that can
prevent the conversion from completing successfully. It calculates the
space required to add volume group disks to a Volume Manager disk
group. More than one volume group may be entered at the prompt. A
grep-like pattern may be used to select multiple volume groups.
See the ``Limitations in Conversion''
section in the Volume Manager Migration Guide for more information.
- Convert LVM Volume Groups to VxVM
Converts one or more LVM volume groups to one or more VxVM disk
groups. This adds the disks to a VxVM disk group and replaces existing
LVM volumes with VxVM volumes.
vxvmconvert prompts you to name the VxVM disk group that replaces
the LVM volume group being converted. A default is suggested at the
prompt. For example, if you are converting a volume group vg08,
vxvmconvert renames it as dg08.
See the sections
``Dealing with New Logical Volume Names''
and
``Tailoring your VxVM Configuration''
in the Volume Manager Migration Guide for more information.
- Rollback from VxVM to LVM
Rollback reverts VxVM disk groups to LVM volume groups.
vxvmconvert provides a limited snapshot capability for the LVM
metadata in a converted volume group. A snapshot is a simple
protection method to use during conversion.
Caution! Do not use this operation if the VxVM disk group was modified
since the conversion.
See to the section
``Restoring LVM Volume Groups and Disaster Recovery''
in the Volume Manager Migration Guide for more information.
- List Disk Information
Displays information about the disks on a system.
You can obtain detailed information about a
disk by entering a specific disk device address.
- List LVM Volume Group Information
Listvg displays a list of LVM volume groups. You can obtain detailed
information about an LVM volume group at a specific disk device
address.
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