VOM (base) is free, VOM Advanced is not.

VOM (base) manages SFHA hosts. It can also discover basic information about non-SFHA hosts (it cannot manage non-SFHA hosts).

There is a central management server (MS) which is needed for managing a bunch of SFHA hosts. You can download it from http://go.symantec.com/vom

VOM has a bunch of reports. The categories are:

1. Licensing: This is not under the reports section, but the data shown here is more like reports.
   Shows you all the SFHA license deployments in your data center (across all the machines that are managed by VOM). The reports can be based on SPVU calculation / Processor price tier / Server price tier, etc. You have some operations here as well.
    

Under the reports section, you have

1. Inventory: 22 reports for things like All Volumes, All Disks, All Enclosures, All File Systems, All Service Groups, etc.
    
2. Environment: 6 reports listing things like
     a) SF Product version --> VxVM, VxFS and VCS versions and patch IDs across all hosts
     b) Patch report: Connects to SORT and shows you all applicable patches for a particular host or hosts.
   etc.
    
3. Trend/Activity: 6 reports showing things like
     a) Cluster Activity: Activity for the selected Clusters over the specified time range.
     b) Uptime Analysis: Calculates the uptime percentage for selected VCS objects and summarizes events affecting the uptime
   etc.
    
4. Storage Reclamation: 7 reports showing things like
     a) Top Hosts for Thin Reclamation: Analyze the storage that can be reclaimed from vxfs file systems and present a list of top candidate hosts for running the reclamation commands.
     b) Underutilized File Systems: Shows all File Systems whose available capacity is not fully utilized
   etc.
    
5. Storage Utilization:14 reports showing things like
     a) Resource Mapping: Shows the mapping between Host and LUN including Path, HBA, Array Port, Enclosure and associated Business Entity.
     b) Savings by file system compression: Analyze the vxfs file systems which are benefited by compression.
   etc.

Regards,
Amit.