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

Chapter 2, Administering Disks

Rootability

Note The target disk for a mirror that is added using the vxrootmir command must be

large enough to accommodate the volumes from the VxVM root disk.

Once you have successfully rebooted the system from a VxVM root disk to init level 1,

you can use the vxdestroy_lvmroot command to completely remove the original LVM

root disk (and its associated LVM volume group), and re-use this disk as a mirror of the

VxVM root disk, as shown in this example:

# /etc/vx/bin/vxdestroy_lvmroot -v c0t0d0

# /etc/vx/bin/vxrootmir -v -b c0t0d0

Note You may want to keep the LVM root disk in case you ever need a boot disk that does

not depend on VxVM being present on the system. However, this may require that

you update the contents of the LVM root disk in parallel with changes that you

make to the VxVM root disk. See “Creating an LVM Root Disk from a VxVM Root

Disk” on page 85 for a description of how to create a bootable LVM root disk from

the VxVM root disk.

For more information, see the vxcp_lvmroot(1M), vxrootmir(1M),

vxdestroy_lvmroot(1M) and vxres_lvmroot (1M) manual pages.

Creating an LVM Root Disk from a VxVM Root Disk

Note These procedures should be carried out at init level 1.

In some circumstances, it may be necessary to boot the system from an LVM root disk. If

an LVM root disk is no longer available or an existing LVM root disk is out-of-date, you

can use the vxres_lvmroot command to create an LVM root disk on a spare physical

disk that is not currently under LVM or VxVM control. The contents of the volumes on the

existing VxVM root disk are copied to the new LVM root disk, and the LVM disk is then

made bootable. This operation does not remove the VxVM root disk or any mirrors of this

disk, nor does it affect their bootability.

Note The target disk must be large enough to accommodate the volumes from the VxVM

root disk.

This example shows how to create an LVM root disk on physical disk c0t1d0 after

removing the existing LVM root disk configuration from that disk.

# /etc/vx/bin/vxdestroy_lvmroot -v c0t1d0

# /etc/vx/bin/vxres_lvmroot -v -b c0t1d0

The -b option to vxres_lvmroot sets c0t1d0 as the primary boot device.