VERITAS Volume Manager 3.1 Migration Guide

Converting LVM to VxVM
Examples
Chapter 2 57
dg08lv1. The VxVMdisk dg0801 is associated with disk device c0t8d0
and is 2080768 blocks in length. The volume dg08lv1 is of type fsgen,is
enabled in the VxVM kernel driver, is of length 102400, and is in the
ACTIVE state. This means that the volume is started, and the plex is
enabled. Operations to the volume such as recovery and data access will
be governed by the usage type fsgen.
The plex dg08lv1-01 is associated with volume dg08lv1, and maps the
entire address range of the volume. Associated with the plex is one
subdisk , dg0801-01 which maps the plex address range from 0 to the
entire length of the plex, i.e. 102400 blocks. As implied by the root of its
name, the subdisk dg0801-01 uses an extent from the VxVM disk
dg0801.
Example: VxVM to LVM rollback
Volume Manager Support Operations
Menu: VolumeManager/LVM_Conversion
1Analyze LVM Volume Groups for Conversion
2Convert LVM Volume Groups to VxVM
3Roll back from VxVM to LVM
listList disk information
listvgList LVM Volume Group information
?Display help about menu
??Display help about the menuing system
qExit from menus
Select an operation to perform: 3
Rollback one or more LVM Volume Groups
Menu: VolumeManager/LVM_Conversion/Rollback_LVM_VG
Use this operation to rollback from a conversion of an LVM Volume
Group. This operation will tear down the VxVM disk group and recreate
the LVM volume group in its original form. User data is untouched by
rollback.
CAUTION If the VxVM configuration has changed since the conversion you should
NOT use this operation. See the section “Restoring the LVM Volume
Group Configuration” for more information.
More than one Volume Group or pattern may be entered at
the prompt. Here are some LVM Volume Group selection