HPC installation failing with the error "Error: Could not stat device /dev/sda - No such file or directory", why ?

Issue

• HPC installation of a compute node fails with the following python traceback, why ?

  Traceback (most recent call last):
    File "/opt/kusu/lib/python/kusu/ui/text/navigator.py", line 221, in run
      self.selectScreen(0)
    File "/opt/kusu/lib/python/kusu/ui/text/navigator.py", line 143, in selectScreen
      contentGrid = self.setupContentGrid()
    File "/opt/kusu/lib/python/kusu/ui/text/navigator.py", line 169, in setupContentGrid
      self.currentScreen.draw(self.mainScreen, self)
    File "/opt/kusu/lib/python/kusu/ui/text/screenfactory.py", line 74, in draw
      self.drawImpl()
    File "/opt/kusu/bin/nodeinstaller", line 286, in drawImpl
      dp = DiskProfile(fresh=False)
    File "/opt/primitive/lib/python2.4/site-packages/primitive/system/hardware/partitiontool.py", line 216, in __init__
      self.populateDiskProfile(fresh, probe_fstab=False)
    File "/opt/primitive/lib/python2.4/site-packages/primitive/system/hardware/partitiontool.py", line 272, in populateDiskProfile
      self.disk_dict = self.__findDisksAndCreateDictionary(fresh)
    File "/opt/primitive/lib/python2.4/site-packages/primitive/system/hardware/partitiontool.py", line 303, in __findDisksAndCreateDictionary
      disk_dict[disk_str] = Disk('/dev/'+disk_str, self, fresh)
    File "/opt/primitive/lib/python2.4/site-packages/primitive/system/hardware/disk.py", line 72, in __init__
      pedDevice = parted.PedDevice.get(path)
  error: Error: Could not stat device /dev/sda - No such file or directory.
  

• The 'addhost' command is executed from the HPC installer node and the compute nodes are booted up for the PXE installation. The compute node boots up properly but tracebacks with the above messages when starting the installation.

• The problem is happening on the IBM x3650 M1 machines. The firmware is updated, but it didn't help.