10-08-2011
Assuming that this is AIX, you define the PP size when creating/restoring the volume groups. There are a few issues to consider though:-
- Have you got a mirrored rootvg?
. If so, then you have a problem. It will require two disks to restore to and create the mirrors. You cannot stop this without serious hacking before the backup is taken.
. If you are not mirrored on the live server then you could lose the server with a single disk failure. Generally on a system with 10 local disks, you can expect a failure on one of them every 3 years. Fewer disks I suppose means there are less to go wrog, so perhaps a lesser risk (arguable) but then you have much more chance of it being catastrophic. Do you feel lucky?
- Is your rootvg definition up to date?
. Make sure you run mkszfile before the mksysb to ensure that the defintion is recreated. If you don't and fileystems have been grown, then it is possible that the data will not fit in based on the old definition.
- How are you restoring your datavg?.
You can either use savevg to grab the lot, or you can use savevg to save just the structure, allowing you to use a bespoke backup or 3rd party software to backup the data. The same issues over mirrors a sufficient disks to recover to exist. There are options to work on removing mirrors as I have this issue too in that live server is local mirrored disk, DR is SAN provided disks, so RAID behind the scenes means I do not need AIX mirrors.
Can you describe a bit more what you have and/or need.
Robin
Liverpool/Blackburn
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LEARN ABOUT HPUX
vxbootsetup
vxbootsetup(1M) vxbootsetup(1M)
NAME
vxbootsetup - set up system boot information on a Veritas Volume Manager disk
SYNOPSIS
/etc/vx/bin/vxbootsetup [-g diskgroup] [medianame ... ]
DESCRIPTION
The vxbootsetup utility configures physical disks so that they can be used to boot the system. Before vxbootsetup is called to configure a
disk, the required volumes, standvol, rootvol and swapvol (and optionally, dumpvol) must be created on the disk. All of these volumes must
be contiguous with only one subdisk.
The -g option may be used to specify the boot disk group.
If no medianame arguments are specified, all disks that contain usable mirrors of the root, swap, /usr and /var volumes are configured to
be bootable.
If medianame arguments are given, only the disks that are associated with the specified disk names are configured to be bootable.
vxbootsetup requires that:
o The root volume must be named rootvol and must have a usage type of root.
o The swap volume must be named swapvol and must have a usage type of swap.
o The volumes containing /usr and /var (if any) must be named usr and var, respectively.
See the chapter "Recovery from Boot Disk Failure" in the Veritas Volume Manager Troubleshooting Guide for detailed information on how the
system boots and how VxVM impacts the system boot process. The vxmirror, vxrootmir, and vxresize utilities call vxbootsetup automatically.
If you use vxassist, or vxmake and vxplex to create mirrors of the root volume on a disk, you must run vxbootsetup explicitly to make the
disk bootable.
ARGUMENTS
medianame
Specifies the disk name (disk media name) of a VM disk that is to be configured as bootable.
SEE ALSO
disksetup(1M), edvtoc(1M), vxassist(1M), vxevac(1M), vxinstall(1M), vxintro(1M), vxmake(1M), vxmirror(1M), vxplex(1M), vxresize(1M),
vxrootmir(1M)
Veritas Volume Manager Troubleshooting Guide
VxVM 5.0.31.1 24 Mar 2008 vxbootsetup(1M)