kernel panic on bootable usb[solved]

[Adel Ahmed]

I have created a liceusb, I however get the cannot mount root file system, with only the internal hard disks listed as avaiable root partitions, if I disable sata then there are not devices at all.
I have a different configuration that can boot up the same machine using hard disk, this kernel can mount usb devices(no modules) while having the exact same options under usb support.

kernel config:
http://pastebin.com/kfaxpKTZ

[DONAHUE]

have you added a rootdelay to your bootloader's kernel line ?
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Defund the FCC.

[Adel Ahmed]

that fixed it
thanks