From: Michael Brooks <michael.brooks@...>
Date: 2008-04-27T11:40:08+09:00
Subject: Re: Free disk space with VMI in megabyte

Toki Toki wrote:
> Hi all!
> 
> I'm new to ruby, I've found this pretty neat code linked on a thread on
> this forum, original post was at:
> http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/95197
> 
> require 'win32ole'
> 
> wmi = WIN32OLE.connect("winmgmts://./root/cimv2")
> disk = wmi.ExecQuery("Select * from Win32_LogicalDisk")
> disk.each {|drive| puts "#{drive.DeviceID} #{drive.FreeSpace}"}
> 
> Now, the code work very well, but I can't convert the free space in MB
> or any other unit, how can I convert it?
> 
> Thanks.
> 
> Best regards.

Hello Toki:

The drive.FreeSpace is being returned as a string (which may also be a 
nil).  Change #{drive.FreeSpace} to #{drive.FreeSpace.class} to see what 
I mean.  You'll need to convert the FreeSpace to a number before you can 
use math operators / functions with it.  Below is an example of how to 
do that with the #to_f (aka "to float") method:

disk.each {|drive| puts "#{drive.DeviceID} #{(drive.FreeSpace.to_f / 
1024) / 1024}"}

Hope that helps,

Michael