import re

node = str(evt.device)
grp = str(evt.DeviceGroups)
comp = str(evt.component)
sum = evt.summary
sev = str(evt.severity)

fs_id = device.prepId(evt.component)
if evt.severity > 0:
   for f in device.os.filesystems():
      if f.id != fs_id: continue
      if evt.severity < 1: continue
      offset = float(getattr(device, "zFileSystemSizeOffset", 1))
      p = ((float(f.usedBytes()) / f.totalBytes()) / offset) * 100
      freeAmt = float((offset * f.totalBytes()) - f.usedBytes())

      if p<94:
          evt._action="drop"
          break

      if p>100:
          p=100

      if freeAmt<0:
          freeAmt=0

      # TB utilization
      if freeAmt > 1000000000000:
          freeAmtTB = freeAmt / 1099511627776
          evt.summary = "Disk space low: %3.1f%% used (%3.2f TB free)" %  (p,freeAmtTB)
          evt.message = evt.summary

      # GB utilization
      elif freeAmt > 1000000000:
          freeAmtGB = freeAmt / 1073741824
          evt.summary = "Disk space low: %3.1f%% used (%3.2f GB free)" %  (p,freeAmtGB)
          evt.message = evt.summary

      # MB utilization
      elif freeAmt > 1000000:
          freeAmtMB = freeAmt / 1048576
          evt.summary = "Disk space low: %3.1f%% used (%3.2f MB free)" %  (p,freeAmtMB)
          evt.message = evt.summary

      # KB utilization
      elif freeAmt < 1000000:
          freeAmtKB = freeAmt / 1024
          evt.summary = "Disk space low: %3.1f%% used (%3.2f KB free)" %  (p,freeAmtKB)
          evt.message = evt.summary

      # This is where we change to a per device threshold
      perDeviceThreshold = 95.0
      m = re.search("zz(\d{3})", f.id)
      #perDeviceThreshold = m and float(m.groups()[0]) or 95.0
      if evt.severity<4:
          if p >= perDeviceThreshold: evt.severity = 3
      if p >= 98.0: evt.severity = 5
      break