VERITAS Volume Manager 3.5 Administrator's Guide (September 2002)

Rootability
72 VERITAS Volume Manager Administrator’s Guide
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 primaryboot 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.
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 canuse thevxdestroy_lvmroot command to completely removethe originalLVM
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 wantto keepthe LVM root disk incase youever need aboot 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” 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.