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By default, ESX Server assigns the BusLogic virtual SCSI adapter to Linux, Windows NT 4.0, Windows 2000 or Windows XP Professional guest operating systems. Similarly, ESX Server assigns the LSI Logic SCSI virtual adapter to Windows 2003 Server guest operating systems.

You can change these default settings by editing the virtual machine's configuration file through the management interface (as described in Modifying the Configuration File Directly (Advanced Users Only)).

1. Look for lines similar to the following in the virtual machine's configuration file:

   scsi0.present = "TRUE"
   scsi0.virtualDev = "vmxbuslogic"
   scsi0.sharedBus = "none"

2. Change the virtual SCSI adapter to your choice. For example, for the scsi0.virtualDev option, change "vmxbuslogic" to "vmxlsilogic".
3. Click OK to save your change and close the Options window.

Note: If you change a virtual machine's virtual SCSI adapter to a custom adapter, your choice is retained if you change the guest operating system in the virtual machine.

If, however, you change the guest operating system on a virtual machine with a BusLogic or LSI Logic SCSI virtual adapter, the virtual SCSI adapter is updated to the default for the new guest operating system.

For example, if you have a virtual machine with a Linux operating system and change the guest operating system to Windows 2003 Server, then the virtual SCSI adapter is LSI Logic, the default virtual SCSI adapter for a Windows 2003 Server guest operating systems.