Veritas Volume Manager 4.1 Administrator's Guide (HP-UX 11i v3, February 2007)

Rootability
84 VERITAS Volume Manager Administrator’s Guide
Setting up a VxVM Root Disk and Mirror
Note These procedures should be carried out at init level 1.
To set up a VxVM root disk and a bootable mirror of this disk, use the vxcp_lvmroot
utility. This command initializes a specified physical disk as a VxVM root disk named
rootdisk## (where ## is the first number starting at 01 that creates a unique disk
name), copies the contents of the volumes on the LVM root disk to the new VxVM root
disk, optionally creates a mirror of the VxVM root disk on another specified physical disk,
and make the VxVM root disk and its mirror (if any) bootable by HP-UX.
The following example shows how to set up a VxVM root disk on the physical disk
c0t4d0:
# /etc/vx/bin/vxcp_lvmroot -b c0t4d0
Note The -b option to vxcp_lvmroot uses the setboot command to define c0t4d0 as
the primary boot device. If this option is not specified, the primary boot device is not
changed.
If the destination VxVM root disk is not big enough to accommodate the contents of the
LVM root disk, you can use the -R option to specify a percentage by which to reduce the
size of the file systems on the target disk. (This takes advantage of the fact that most of
these file systems are usually nowhere near 100% full.) For example, to specify a size
reduction of 30%, the following command would be used:
# /etc/vx/bin/vxcp_lvmroot -R 30 -v -b c0t4d0
The verbose option, -v, is specified to give an indication of the progress of the operation.
Caution Only create a VxVM root disk if you also intend to mirror it. There is no benefit
in having a non-mirrored VxVM root disk for its own sake.
The next example uses the same command and additionally specifies the -m option to set
up a root mirror on disk c1t1d0:
# /etc/vx/bin/vxcp_lvmroot -m c1t1d0 -R 30 -v -b c0t4d0
In this example, the -b option to vxcp_lvmroot sets c0t4d0 as the primary boot device
and c1t1d0 as the alternate boot device.
This command is equivalent to using vxcp_lvmroot to create the VxVM-rootable disk,
and then using the vxrootmir command to create the mirror:
# /etc/vx/bin/vxcp_lvmroot -R 30 -v -b c0t4d0
# /etc/vx/bin/vxrootmir -v -b c1t1d0
The disk name assigned to the VxVM root disk mirror also uses the format rootdisk##
with ## set to the next available number.