> By mistake I installed my raid1 system to use hdc3 as disk 0 and hda3 as
> disk 1.
Why is that a `mistake' ?
> Now I'm planning to change the disks to another machine that cannot boot from
> any other device than hda which means that the current installation would not
> work since I'm booting with lilo and the /-partition is also on the raid
> system.
If you are using a recent LILO with the RAID1 patch, it will boot of either
disk.
> The question is how do I change the disk 0 to be disk 1 and vice versa
> without losing data?
I can see no reason so to do -- it should just work !
> (I'm using RH 6.2 standard installation with raid1 built in to kernel)
Should all work !