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Veritas: ID free space in a disk group
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:Title:        Veritas: ID free space in a disk group
:Author:       Douglas O'Leary <dkoleary@olearycomputers.com>
:Description:  Veritas: ID free space in a disk group
:Date created: 08/2008
:Date updated: 09/2009
:Disclaimer:   Standard: Use the information that follows at your own risk.  If you screw up a system, don't blame it on me...

There's a couple of ways to determine how much free space you have and/or can 
use in a particular disk group. To print out the entire free space, issue::

    vxdg -g ${group} | grep -i '^${group}' | \
    awk '{Sum += $6} END {printf ("Megs free: %.2f\n",Sum/2048)}'

That will tell you the grand total of megs free in ${group}'s disk group. 
That may or may not be the largest amount of space that you can use. Veritas 
can show you what it thinks the largest volume it can create using the layout 
of your choice by executing the following command:

    vxassist maxsize layout=${layout}

where layout = simple | stripe | raid5

For example::

    vxassist maxsize layout=simple
    Maximum volume size: 376832 (184 Megs)
    
    vxassist maxsize layout=stripe
    Maximum volume size: 376832 (184 Megs)
    
    vxassist maxsize layout=raid5
    Maximum volume size: 376832 (184 Megs)