After doing some trial and error I generated this:
Hope some of you find it helpful.
Servers with less than 10% free drive space.
Select Top 1000000 tblAssets.AssetID,
tblAssets.AssetUnique,
tsysOS.OSname,
tblAssets.Description,
tblDiskdrives.Caption,
Cast(Cast(tblDiskdrives.Freespace As bigint) / 1024 / 1024 As numeric) As
free,
Cast(Cast(tblDiskdrives.Size As bigint) / 1024 / 1024 As numeric) As
[total size],
Ceiling((tblDiskdrives.Size - tblDiskdrives.Freespace) /
(Case tblDiskdrives.Size When 0 Then 1 Else tblDiskdrives.Size
End) * 100) As UsedPCT,
tblDiskdrives.Lastchanged As [last changed],
tsysOS.Image As icon
From tblAssets
Inner Join tblDiskdrives On tblAssets.AssetID = tblDiskdrives.AssetID
Inner Join tblAssetCustom On tblAssets.AssetID = tblAssetCustom.AssetID
Inner Join tsysOS On tblAssets.OScode = tsysOS.OScode
Inner Join tblOperatingsystem
On tblAssets.AssetID = tblOperatingsystem.AssetID
Inner Join tblComputersystem On tblAssets.AssetID = tblComputersystem.AssetID
Where Cast(Cast(tblDiskdrives.Size As bigint) / 1024 / 1024 As numeric) <> 0 And
Ceiling((tblDiskdrives.Size - tblDiskdrives.Freespace) /
(Case tblDiskdrives.Size When 0 Then 1 Else tblDiskdrives.Size
End) * 100) > 90 And tblDiskdrives.DriveType = 3 And tblAssetCustom.State = 1
And tblComputersystem.Domainrole > 1
