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You put them on the kernel command line in your bootloader (GRUB or LILO). You need to figure out which bootloader you are using, and edit /etc/grub.conf or /etc/lilo.conf as appropriate. In the section for your kernel, you should be able to put:
append="<your options>"
to add the options to the kernel command line. If you're using LILO, you also have to run /sbin/lilo -v before you reboot the system.
Warning: LBA32 addressing assumed
Using BIOS device code 0x81 for RAID boot blocks
Reading boot sector from /dev/md0
Warning: /dev/md0 is not on the first disk
Fatal: map file must be on the boot RAID partition
....my computer is still booting from hda (root=/dev/hda1)
i also tried to put command append="md=0,/dev/hdc1 root=/dev/md0" on lilo prompt but not woorking
Hmmm ... do you have your /etc/raidtab file set up correctly? FYI this pahge has some example config files (you should read the rest of the guide too, if you haven't already).
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