hi, how can i know which is the system disk by bios? i've pc with 2 sata disk connected to the on board sata controller and 2 other connected to a pci card sata controller. bios see all disk as well as linux, but in linux kernel sda and sdb is the pci card's 2 disks and the on board controllers are sdc and sdd. my problem is centos install the system by default to sda and intall grub in the system disk's mbr (ie. sda's mbr). which is right most of the time, but in my case the system is not boot after the install since grub (and the os) it's not on the system disk where the bios try to find it. ok after i recognize it i can choose sdc during install and install the whole system there, but the worse thing is that i'd like to do it from a kickstart file _automaticaly_. so i have to somehow discover which disk will be choosen by the bios as system disk? or which disk is connected to the on board controller and which is the pci extension card? how can i find out this information (eg. by a shell script in kickstart %pre section)? and this scripts should have to work for all kind of motherboard and sata card too:-) thanks.