How do I get disk space statistics for a clustered disk - c#-4.0

Question

I have a working program that retrieves information of disk such as FreeSpace, TotalSpace etc from a remote server. I have a problem however that i cannot get the same statistics for all Clustered Disks configured on the server. The query only returns information for the Local Disk (Logical Disk).
I am able to get sizes for Local Disk(:C) as below :
public List<Disk> GetEnvironmentStatistics()
{
var serverIP = Convert.ToString(System.Web.HttpContext.Current.Session["ServerIP"]);
List<Disk> diskinfo = new List<Disk>();
//Add System.Management to access these utilities
ConnectionOptions options = new ConnectionOptions
{
Username = Convert.ToString(System.Web.HttpContext.Current.Session["Username"]),
Password = Convert.ToString(System.Web.HttpContext.Current.Session["Password"]),
Authority = Convert.ToString(System.Web.HttpContext.Current.Session["Authority"]),
};
//root - root of the tree, cimv2 - version
ManagementScope scope = new ManagementScope("\\\\" + serverIP + "\\root\\CIMV2", options);
scope.Connect();
SelectQuery query = new SelectQuery("Select * from Win32_LogicalDisk");
ManagementObjectSearcher searcher = new ManagementObjectSearcher(scope, query);
ManagementObjectCollection queryCollection = searcher.Get();
foreach (ManagementObject mo in queryCollection)
{
Disk disk = new Disk();
disk.DiskName = mo["Name"].ToString();
disk.DeviceId = mo["DeviceID"].ToString();
disk.SystemName = mo["SystemName"].ToString();
disk.FreeSpace = Convert.ToDecimal(mo["FreeSpace"]);
var formattedFreeSpace = Helpers.DiskSpaceInGigabytes(disk.FreeSpace ?? 0);
disk.FreeSpace = Decimal.Truncate(formattedFreeSpace);
disk.TotalSpace = Convert.ToDecimal(mo["Size"]);
var formattedTotalSpace = Helpers.DiskSpaceInGigabytes(disk.TotalSpace ?? 0);
disk.TotalSpace = Decimal.Truncate(formattedTotalSpace);
disk.UsedSpace = disk.TotalSpace - disk.FreeSpace;
var HDPercentageUsed = 100 - (100 * disk.FreeSpace / disk.TotalSpace);
disk.PercentageUsed = Convert.ToInt32(HDPercentageUsed);
diskinfo.Add(disk);
}
return diskinfo;
}
I have logged into the server and noted the other disks appear as Clustered Disk.
I have researched a bit about the Clustered Disks or Cluster Shared Volumes but the only guides i see include Powershell Scripting like here : ClusteredSharedVolume Disk Space.
My question - how can i write a WMI query that also retrieves information for Clustered Disks. Precisely how i can adapt the query in the provided link for my needs :
$resources = Get-WmiObject -namespace root\MSCluster MSCluster_Resource -filter "Type='Physical
Disk'"
$resources | foreach {
$res = $_
$disks = $res.GetRelated("MSCluster_Disk")
$disks | foreach {
$_.GetRelated("MSCluster_DiskPartition") |
select #{N="Name"; E={$res.Name}}, #{N="Status"; E={$res.State}}, Path, VolumeLabel, TotalSize, FreeSpace
}
} | ft

Answer 1

The solution requires invoking Powershell script in C# :
1. Add System.Management.Automation Reference
This dll enable access to Powershell utilities. The packages available on Nuget seem ahead and are not being recognized so i had to manually add the Reference by References >> Add Reference >> Browse >> C:\Windows\assembly\GAC_MSIL\System.Management.Automation\1.0.0.0__31bf3856ad364e35
Using Powershell i can get disk information for all Clustered Disks by the command :
get-WmiObject win32_logicaldisk -Computername (ComputerName or IPAddress here)
2. Invoke this command in code
I added an extension method that checks for whether the remote host has Clustered Disks (if any) . If it indeed has , then use the Powershell script , if not then use normal WMI query :
public List<Disk> GetEnvironmentStatistics()
{
List<Disk> diskinfo = new List<Disk>();
var serverIP = Convert.ToString(System.Web.HttpContext.Current.Session["ServerIP"]);
var clusterDisksStatus = CheckForClusteredDisks(serverIP);
if (Helpers.HasClusteredDisks(clusterDisksStatus))
{
string getClusterSharedVolumesStatistics = "get-WmiObject win32_logicaldisk -Computername " + serverIP + "";
PowerShell ps = PowerShell.Create();
ps.AddScript(getClusterSharedVolumesStatistics);
var results = ps.Invoke();
foreach (var psobject in results)
{
if (psobject != null)
{
Disk clusteredDisk = new Disk();
clusteredDisk.DiskName = Convert.ToString(psobject.Members["DeviceID"].Value);
clusteredDisk.FreeSpace = Convert.ToDecimal(psobject.Members["FreeSpace"].Value);
var formattedFreeSpace = Helpers.DiskSpaceInGigabytes(clusteredDisk.FreeSpace ?? 0);
clusteredDisk.FreeSpace = Decimal.Truncate(formattedFreeSpace);
clusteredDisk.TotalSpace = Convert.ToDecimal(psobject.Members["Size"].Value);
var formattedTotalSpace = Helpers.DiskSpaceInGigabytes(clusteredDisk.TotalSpace ?? 0);
clusteredDisk.TotalSpace = Decimal.Truncate(formattedTotalSpace);
clusteredDisk.UsedSpace = clusteredDisk.TotalSpace - clusteredDisk.FreeSpace;
clusteredDisk.VolumeName = Convert.ToString(psobject.Members["VolumeName"].Value);
diskinfo.Add(clusteredDisk);
}
}
}
else
{
//Add System.Management to access these utilities
ConnectionOptions options = new ConnectionOptions
{
Username = Convert.ToString(System.Web.HttpContext.Current.Session["Username"]),
Password = Convert.ToString(System.Web.HttpContext.Current.Session["Password"]),
Authority = Convert.ToString(System.Web.HttpContext.Current.Session["Authority"]),
};
//root - root of the tree, cimv2 - version
ManagementScope scope = new ManagementScope("\\\\" + serverIP + "\\root\\CIMV2", options);
scope.Connect();
SelectQuery query = new SelectQuery("Select * from Win32_LogicalDisk");
ManagementObjectSearcher searcher = new ManagementObjectSearcher(scope, query);
ManagementObjectCollection queryCollection = searcher.Get();
try
{
foreach (ManagementObject mo in queryCollection)
{
Disk disk = new Disk();
disk.DiskName = mo["Name"].ToString();
disk.DeviceId = mo["DeviceID"].ToString();
disk.SystemName = mo["SystemName"].ToString();
disk.FreeSpace = Convert.ToDecimal(mo["FreeSpace"]);
var formattedFreeSpace = Helpers.DiskSpaceInGigabytes(disk.FreeSpace ?? 0);
disk.FreeSpace = Decimal.Truncate(formattedFreeSpace);
disk.TotalSpace = Convert.ToDecimal(mo["Size"]);
var formattedTotalSpace = Helpers.DiskSpaceInGigabytes(disk.TotalSpace ?? 0);
disk.TotalSpace = Decimal.Truncate(formattedTotalSpace);
disk.UsedSpace = disk.TotalSpace - disk.FreeSpace;
var HDPercentageUsed = 100 - (100 * disk.FreeSpace / disk.TotalSpace);
disk.PercentageUsed = Convert.ToInt32(HDPercentageUsed);
diskinfo.Add(disk);
}
}
catch (DivideByZeroException ex)
{
ExceptionLogger.SendErrorToText(ex);
}
}
return diskinfo;
}
And the Helper method to check :
public static bool HasClusteredDisks(int status)
{
int hasClusteredDisks = 1;
if (status == hasClusteredDisks)
{
return true;
}
else
{
return false;
}
}