Check All VMFS Datastores connected on all VMware ESXi Hosts

CheckDatastoresConnected.ps1

# Start Load VMware  Snapin (if not already loaded)
if (!(Get-PSSnapin -Name VMware.VimAutomation.Core -ErrorAction SilentlyContinue)) {
	if (!(Add-PSSnapin -PassThru VMware.VimAutomation.Core)) {
		# Error out if loading fails
		Write-Error "ERROR: Cannot load the VMware Snapin. Is the PowerCLI installed?"
		Exit
	}
}
# End Load VMware  Snapin (if not already loaded)

# Start Global Definitions
$VIServer = "yourvCenter.lan.local"
$DataCenterName = "yourDataCenter"
# End Global Definitions

# Start vCenter Connection
Write-Output "Starting to Process vCenter Connection to " $VIServer " ..."
$OpenConnection = $global:DefaultVIServers | where { $_.Name -eq $VIServer }
if($OpenConnection.IsConnected) {
	Write-Output "vCenter is Already Connected..."
	$VIConnection = $OpenConnection
} else {
	Write-Output "Connecting vCenter..."
	$VIConnection = Connect-VIServer -Server $VIServer
}

if (-not $VIConnection.IsConnected) {
	Write-Error "Error: vCenter Connection Failed"
    Exit
}
# End vCenter Connection

# Start Check All Datastores on all Hosts
$MyErrors = ""
$myDataCenter = Get-Datacenter -Name $DataCenterName
$AllStores = $myDataCenter | Get-Datastore | where {$_.Accessible -eq "True"} | Sort Name
$AllHosts = $myDataCenter | Get-VMhost | where {$_.ConnectionState -eq "Connected"} | Sort Name

foreach ($myHost in $AllHosts) {
	foreach ($myStore in $AllStores) {
		try {
			Write-Output "Check $myStore on $myHost"
			$DS = $myHost | Get-Datastore -Name $($myStore.Name) -ErrorAction Stop
			}
			catch {
				Write-Output "	...Not Found"
				$MyErrors += "Datastore $myStore not found on $myHost `n"
				}
	}
}
# End Check All Datastores on all Hosts

Write-Output "" $MyErrors