Symantec Messaging Gateway 9.x Virtual Edition 9.5.2 or higher kernel panics if the SCSI controller type is changed to LSI SAS.
At booting phase
switchroot: mount failed: No such file or directory
Kernel panic - not syncing: Attempted to kill init!
<0>Rebooting in 5 seconds..
The SCSI controller type has to be changed prior to updating Symantec Messaging Gateway 9.x Virtual Edition to any version higher than 9.5.1.
Changing SCSI controller type is crucial to keep the Virtual Machine compatible with newer versions of Symantec Messaging Gateway.
Note: If you are not seeing LSI SAS a selectable option for the VMware SCSI controller you will need to convert the virtual hardware version to 7. For steps on this process, please refer to the following KB:
Symantec Messaging Gateway 9.x
VMware ESX/ESXi 4.0 and 4.1