Hope everyone is well today. I have Windows XP installed on HD and Ubuntu installed on SD card. I have installed grub on 1st partition on HD. I want the PC to load grub and boot Ubuntu from SD card, if the SD card is in, or-else boot from windows on HD.
Let me explain the situation: I want to use a PC on windows XP, but if there is any problem with XP then i will call the client ask him to push in the SD card and reboot the PC. Once PC starts booting it will load grub and grub will then find the SD card and will boot ubuntu kernel, and i can login and diagnose XP from ubuntu. Once this is done i can ask client to push out the SD card and switch on the computer. Now computer will not find ubuntu on SD card so it will load XP.