This example shows how to report the disk storage extents that are available to a managed server, in the absence of a dedicated storage provider supplied by a storage vendor. Information about the storage extents is limited when a dedicated storage provider is not installed. The limited information can still be useful for configuring the managed servers in a datacenter.

You can locate disk storage extents by enumerating instances of VMware_HypervisorStorageExtent in the Implementation namespace. The pseudocode in this topic depends on the pseudocode in Make a Connection to the CIMOM.

To report storage extents

Procedure
1

Connect to the server URL.

Specify the Implementation namespace, supplied as a parameter, for the connection.

The actual namespace you will use depends on your installation. 

use wbemlib
use sys
use connection renamed cnx
connection = Null

params = cnx.get_params()
if params is Null
   sys.exit( -1 )
connection = cnx.connect_to_host( params )
if connection is Null
   print 'Failed to connect to: ' + params['host'] + ' as user: ' + params['user']
   sys.exit( -1 )
2

Enumerate instance names of VMware_HypervisorStorageExtent.

Select the instances where the OtherIdentifyingInfo property begins with ’/vmfs/devices/disks’. For each such instance, print the ElementName, OtherIdentifyingInfo, and OperationalStatus properties. 

use value_mapper renamed mapper
instances = connection.EnumerateInstances( ’VMware_HypervisorStorageExtent’ )
for instance in instances
   if instance[ ’OtherIdentifyingInfo’ ][ 0 ] begins ’/vmfs/devices/disks’
      status = mapper.map_instance_property_to_string( connection, \
                                                       instance, \
                                                       ’OperationalStatus’ )
      print ’ Storage Extent = ’ + instance[ ’ElementName’ ]
      print ’   Other Info: ’ + instance[ ’OtherIdentifyingInfo’ ]
      print ’   OperationalStatus: ’ + status
A sample of the output looks like the following:
Storage Extent = Local Disk (naa.7001e4e041d08f00119991caf9fd2aaf) 
  Other Info: /vmfs/devices/disks/naa.7001e4e041d08f00119991caf9fd2aaf
  OperationalStatus: OK