Tuesday, June 21, 2005

Veritas: ID free space in a disk group

Veritas: ID free space in a disk group

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:

1. vxassist maxsize layout=simple
Maximum volume size: 376832 (184 Megs)

2. vxassist maxsize layout=stripe
Maximum volume size: 376832 (184 Megs)

3. vxassist maxsize layout=raid5
Maximum volume size: 376832 (184 Megs)

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