Always use local disk for driveorder

[Romu Hu]

Hi,

When installing with kickstart, sda is not always the local disk, e.g. 
it may be a storage device connected to HBA.  How to tell anaconda to 
find the device name of the local disk and always use it for driveorder? 
i.e. always install Linux (and boot loader) in the local disk.

Thanks
Romu