Looking at the situation, you should run following command on Linux Rescue mode.
copy and past the output of the same over here.
Also you should provide content of device.map file
as far as solutions are concerned try the following and let me know whether it worked for you.
Simply change ‘/dev/sda1’ to ‘/dev/sda’
Also try to unload module ehci_hcd by running following command.
if you don’t wanted to do that simply blacklist the same.
modprobe -r ehci_hcd