udev keeps deleting my /dev/sda* nodes for my sata hard drive, i could create them manually but i think udev will probably decide that they should go again, i wouldn't mind it deleting them if it also created them, but it doesn't, as soon as something happens like changing the partitions on the drive or something the nodes get deleted, and the same thing happens with the usb storage stuff (but at that time, it was on /dev/sda)

so i guess i have to do the rules for udev, but how? i have no clue what to do to get udev to make it right

anyone?

I find that udev is pretty good at creating nodes in /dev quite soon after the modules are modprobed. What modules are you using? lsmod can be educational.
The best solution is to build the features you need into the kernel then udev creates the nodes on boot