[ubuntu] GRUB2 installation failure on USB memory

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http://ubuntuforums.org – Hi, I intend to create an Ubuntu (12.04 386) based "PC on a Disk on key) as part of my preparation for a long trip. I took a 32 GB USB memory (Labeled Linux Mint from a former use), booted the PC from a CD, and chose to install on the /dev/sdc (USB memory) and install the grub2 too on that device. Installation ( with / on sdc1 with NO separate /boot) completed with only a single problem- it reported it couldn't install grub. I completed the installation and rebooted from the CD into a live session with the USB still plugged in. Somehow I have seen the DOK (disk on Key) icon appearing (Hardware)