Sarge upgrade to kernel 2.6, software raid

[MatB <miagiCutThis@tiscali.it>]

Hi,
I upgraded the kernel image from 2.4.x to 2.6.8; i have software raid from 
boot (with the initrd for raid). 
With kernel 2.6.8 the block device /dev/md0 cannot be assembled, at boot i 
get:
    	mdadm: cannot open device /dev/hdd1: No such device or address
    	mdadm: /dev/hdd1 has wrong uuid. 

i thought that it was just because of the name change (hdd->sda) and 
modified the initrd image accordingly, but again i get:
    	mdadm: cannot open device /dev/sda1: No such device or address
    	mdadm: /dev/sda1 has wrong uuid. 

Please help me get out of kernel panic.

MatB