Moving Volumes to Disk Partitions

All volumes must be moved to disk partitions. This can be done using one of these procedures:

• Back up the system fully onto tape and then recover from it.
• Back up each file system individually and then recover them all after creating new file systems on disk partitions.
• Use VxVM to move volumes incrementally onto disk partitions as described in the following section.

Moving Volumes onto Disk Partitions Using VxVM

  To move volumes to disk partitions

1. Evacuate disks using vxdiskadm, the GUI, or the vxevac script.

   Evacuation moves subdisks from the specified disks to target disks. The evacuated disks provide the initial free disk space for volumes to be moved to disk partitions.

2. Remove the evacuated disks from VERITAS Volume Manager control by entering:
     # vxdg rmdisk diskname
     # vxdisk rm devname
3. Decide which volume to move first, and if the volume is mounted, unmount it.
4. If the volume is being used as a raw partition for database applications, make sure that the application is not updating the volume and that you have applied the sync command to the data on the volume.
5. Create a partition on free disk space of the same size as the volume using the format command.

   If there is not enough free space for the partition, add a new disk to the system for the first volume removed. Subsequent volumes can use the free space generated by the removal of this first volume.

6. Copy the data on the volume onto the newly created disk partition using a command such as dd.
        # dd if=/dev/vx/dsk/diskgroup/lhome of=/dev/dsk/c2t2d2

   where c2t2d2 is the disk outside of Volume Manager and s7 is the newly created partition.

7. Replace the entry for that volume (if present) in /etc/fstab with an entry for the newly created partition.
8. Mount the disk partition if the corresponding volume was previously mounted.
9. Remove the volume from VERITAS Volume Manager using the command.
     # vxedit -rf rm volume_name
10. Remove any free disks (those having no subdisks defined on them) by removing the volumes from VERITAS Volume Manager control.

    To check if there are still some subdisks remaining on a particular disk, use the vxprint command.

    
      # vxprint -F '%sdnum' diskname

    If the output is not 0, there are still some subdisks on this disk that you need to remove. If the output is 0, remove the disk from VERITAS Volume Manager control.

    
      # vxdg rmdisk diskname
      # vxdisk rm devname

    Use the free space created for adding the data from the next volume you want to remove.

11. After you successfully convert all volumes into disk partitions, reboot the system.
12. After the reboot, make sure none of the volumes are open by using the vxprint command.
      # vxprint -Aht -e v_open

If any volumes remain open, repeat the steps listed above.

Example

This example shows how to move the data on a volume to a disk partition. In the example, there are three disks: disk1 and disk2 are subdisks on volume vol01 and disk3 is a free disk. The data on vol01 is copied to disk3 using vxevac.

Diskgroup voldg content before the data on vol01 is copied to disk3.

Evacuate disk1 to disk3.

Evacuate disk2 to disk3.

Remove the evacuated disks from VERITAS Volume Manager control.

Verify that the evacuated disks have been removed from VERITAS Volume Manager control.

Check to see whether the volume you want to move first is mounted.

Create a partition on free disk space of the same size as the volume. In this example, a 2G partition is created on disk1 (c1t12d0).

Copy the data on vol01 to the newly created disk partition.

In the /etc/fstab file, remove the following entry.

Replace it with an entry for the newly created partition.

Mount the disk partition.

Remove vol01 from VERITAS Volume Manager.

To complete the procedure, follow Steps 10 through 12 in the previous section, Moving Volumes to Disk Partitions.

Shutting Down VERITAS Volume Manager

To shut down VERITAS Volume Manager, enter the vxdctl and vxiod commands as follows: