I don't believe you can 'fix' this.  Since the drive letters remain correct, I would not worry about the actual disk ID #.   The order comes from the order they were logged into. 
hi guys I have virtual Machine that will be used as a Windows 2008 Cluster Since my SAN is iSCSI I am assigning LUNs for my Virtual Machine the thing is the initial setup in disk management is as below   But after I reboot my disk management gets messed up like this [IMAGE] After reboot [IMAGE] any ideas guys how to fix this? thanks a lot
iSCSI LUNs Windows 2008 - ps6010e