boot devices order problem

[Axel]

Hello

I just tryied to install Fedora core 6, but stopped it before disk 
partitionning.

I use a motherboard with 2 integrated raid controllers : one in the 
nforce chipset, another one with a Silicon Image controller. My disk is 
plugged in the silicon image controller.

I have also a firewire hard drive.

After boot, kernel messages tell me that the firewire hard drive is 
known as /dev/sda and the internal S-ATA drive as /dev/sdb.

The fedora wizard wanted to use the /dev/sda drive as main drive. I can 
easily use /dev/sdb instead of and manually modify grub paths in order 
to have a clean boot.

I wonder : if I go with this setup (boot partitions on /dev/sdb), if I 
don't have the external hard drive plugged or turned on while the kernel 
load, my internal drive will be mapped to /dev/sda ? What would happen 
during the mount of partition ? the root partition won't be mounted ?

I have not always the external hard drive , so I think the best 
workaround would be to turn it off , install FC6, and never have the 
external drive turned on if i want the boot to pass. Or maybe someone 
has a better idea ?


Thanks in advance.