I installed mdadm via apt-get install mdadm and after a reboot grub output something like this.

Code:
VFS: Cannot open root device "sda1" or unknown-block(0,0)
Please append a correct "root=" boot option
I have tried to remove mdadm via a live env. but i dont think its working,

Code:
/boot/initrd.img-2.6.18-5-486 has been altered. Cannot update.
invoke-rc.d: ----------------------------------------------------
invoke-rc.d: WARNING: invoke-rc.d called during shutdown sequence
invoke-rc.d: enabling safe mode: initscript policy layer disabled
invoke-rc.d: ----------------------------------------------------
invoke-rc.d: ----------------------------------------------------
invoke-rc.d: WARNING: invoke-rc.d called during shutdown sequence
invoke-rc.d: enabling safe mode: initscript policy layer disabled
invoke-rc.d: ----------------------------------------------------
I would appricate ANY ideas!