VERITAS Volume Manager 3.5 Migration Guide (September 2004)

Chapter 2

Converting LVM to VxVM

Examples

vxprint Explained The vxprint list given above provides the following information:

The disk group dg08 contains the VxVM disk dg0801 and the volume dg08lv1. The VxVM disk 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

1 Analyze LVM Volume Groups for Conversion

2 Convert LVM Volume Groups to VxVM

3 Roll back from VxVM to LVM

list List disk information

listvgList LVM Volume Group information

? Display help about menu

?? Display help about the menuing system

q Exit 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” on page 19” for

more information.

More than one Volume Group or pattern may be entered at the prompt.

Here are some LVM Volume Group selection examples:

all: Rollback all converted LVM Volume Groups

listvg:list all LVM Volume Groups eligible for rollback

list: list all disk devices

Select Volume Group(s) to rollback :

[<pattern-list>,all,list,listvg,q,?]

vg08

Roll back this Volume Group? [y,n,q,?] (default: y)

Rolling back LVM configuration records for Volume Group vg08

Selected Volume Groups have been restored.

Hit RETURN to continue.

Rollback other LVM Volume Groups? [y,n,q,?] (default: n)