Hitachi Dynamic Link Manager, User Manual

Page: 326 / 746

3. Creating an HDLM Environment
302
To re-create the volume group on the HDLM device, execute the
vgscan
command as shown in the following example:
# vgscan
Reading all physical volumes. This may take a while...
Found exported volume group "vg01" using metadata type lvm2
8. Import the volume group.
In the following example, the command imports the
vg01
volume group:
# vgimport vg01
Volume group "vg01" successfully imported
9. Execute the
pvscan
command to check that the environment has been changed
successfully.
The following shows an example of executing the
pvscan
command:
# pvscan
PV /dev/sda1 VG vg01 lvm2 [468.00 MB / 368.00 MB free]
PV /dev/sda2 VG vg01 lvm2 [548.00 MB / 548.00 MB free]
Total: 2 [1016.00 MB] / in use: 2 [1016.00 MB] / in no VG: 0
[0 ]
10. Activate the volume group.
In the following example, the logical volume subject to the move belongs to the
vg01
volume group:
# vgchange -ay vg01
1 logical volume(s) in volume group "vg01" now active
11. If the
/etc/fstab
file was edited (a section was commented out) in step 5,
return the commented out section to its original state.
12. Mount the logical volume that was moved.
In the following example, the logical volume that was moved is
/dev/vg01/
lvol1
and the command mounts the volume on
/mnt/lvol1
:
# mount /dev/vg01/lvol1 /mnt/lvol1
3.23.9 Canceling the md Device Settings
This subsection describes how to migrate an environment where the md devices were
constructed by using HDLM-managed devices to an environment where the md
devices were constructed by using SCSI devices.