Calculating free space

[Igor Sovin]

How to make script that calculates free space left on a volume?

[Torsten.]

Do a "pvdisplay -v /dev/dsk/cxtxdx" for this disk and note PE Size and Free PE. Now you can calculate. The same for free space available for new or extended LVOL with the "vgdisplay -v" command.

[Fabio Ettore · Accepted solution]

Hi Igor,

it depends what you mean with volume (logical volume and filesystem or volume group).
If you mean filesystem then in attachment a script. When you launch it then the script will send a mail (to ) if there is a filesystem that take over 90% on bdf. You can schedule it by cron every day to check.

If you mean volume group launch vgdisplay and take two lines:

PE Size (Mbytes) 4
Free PE 413

Here above just an example:
4*413 = 1652 Mb free on volume group

HTH.

Best regards,
Fabio

[Igor Sovin]

Hi Fabio!
Thank you! I think your script can help me greatly, but how to calculate free space in Kbs left on file system?

[Fabio Ettore]

Hi Igor,

just launch

bdf

and under the column 'avail' you will see the free space available on filesystems. It is in Kbytes!

HTH.

Best regards,
Fabio

[spex]

Fabio,

bdf | awk '{a+=$4} END {printf "%d\n",a}'

will give you total kbytes free across all volumes. If you want to limit the sum to local volumes, use 'bdf -l' instead of 'bdf'.

PCS

[Igor Sovin]

Thanks Spex, that was exactly what I need.
And thanks to all