WMI query with multiple and/or conditions?

Ruby
1

I am using Ruby to write a format disk script. I am using WMI to
differentiate local logical disks from virtual floppies, CD-roms, and
attached SAN disks. The differentiation is in the win32_DiskDrive
class, under the “caption” section. Since this script will be run on
VMs, HP, or Dell, I need it to look for multiple conditions, and I’m not
sure how to do it. Here is a section of code that works when only
looking for VM disks:

require ‘ruby-wmi’
logical_disks = WMI::Win32_DiskDrive.find(:all, :conditions => {
:Caption => ‘VMware Virtual disk SCSI Disk Device’ } )

Can I add multiple conditions to it, such as two other potential
:Captions? Some way to do an ‘or’ in there so it will capture data from
either VMware Virtual Disks, or HP Logical Disks, or Dell Perc, etc?

2

On Thu, Aug 2, 2012 at 9:45 AM, Charlie B. [email protected] wrote:

I am using Ruby to write a format disk script. I am using WMI to
differentiate local logical disks from virtual floppies, CD-roms, and
attached SAN disks. The differentiation is in the win32_DiskDrive
class, under the “caption” section. Since this script will be run on
VMs, HP, or Dell, I need it to look for multiple conditions, and I’m not
sure how to do it. Here is a section of code that works when only
looking for VM disks:

You can use a string for :conditions.

WMI::Win32_DiskDrive.find(:all, :conditions => “Caption = ‘VMware
Virtual disk SCSI Disk Device’ OR Caption = ‘HP drive’ OR Caption =
‘VMWare drive’” )

A few other options that occured to me are; WIn32_DiskDrive already
eliminates non-disk drives. So, if I’m reading it right, you really
only need to eliminate SAN drives. So, assuming your SAN disks have a
model of PowerDevice by PowerPath, you could do:

WMI::Win32_DiskDrive.find(:all, :conditions => “model !=‘PowerDevice
by PowerPath’” )

or

WMI::Win32_DiskDrive.all( :conditions => “NOT model LIKE ‘%PowerPath%’”
)