make menuconfig
make
make modules_install
make install
update-initramfs -c -k 3.17.2
update-grub

**early console in decompress_kernel
Decompressing Linux... Parsing ELF... done.
Booting the kernel.
Gave up waiting for root device. Common problems:
- Boot args (cats /proc/cmdline)
  - Check rootdelay= (did the system wait long enough?)
  - Check root= (did the system wait for right device?)
- Missing modules (cat /proc/modules; ls /dev)
ALERT! /dev/disk/by-uuid/c519ae92-164a-4078-b687-2b4734166533 does not exist.
Dropping to a shell!
BusyBox v1.22.1 (Ubuntu 1:1.22.0-8ubuntu1) built-in shell (ash)
Enter 'help'for a list of built-in commands.
(initramfs)