DiskType and Interface frequently return wrong values

[fthobe]

$computerHDDfilter = “Select InterfaceType from win32_DiskDrive where InterfaceType <> 'USB'”
$computerHDD = Get-WmiObject win32_DiskDrive -Filter “NOT InterfaceType like 'USB'” | Select -property Manufacturer, Model, InterfaceType, Size, MediaType, SerialNumber

Should return Solid State Disk if called with as below:

#Build the CSV file
$csvObject = New-Object PSObject -property @{
    'HDDType' = $computerHDD.MediaType
    }  

Instead it returns Hard Disk