Hard disk device number keep changing

[phantom8]

I've installed Kalyway 10.5.2 on my Hackintosh. Everything works properly, except the device number for the 2 hard disks keep changing each time the system boots. For example, the boot disk may get assigned as /dev/disk0 and the 2nd disk assigned /dev/disk1. However, the next reboot, the boot disk may get /dev/disk1 and the 2nd disk gets /dev/disk0. This is totally random. Is there any way to fix the device number, so that each time it will get assigned the same device number upon booting up? Any help is much appreciated.