ubuntu 14.04 installed in usb pendrive and works.

[ramaswamyps]

i got the 64 bit desktop ubuntu 14.04 ad installed n my toshiba satellite c855d laptop.
here it installed without much problem.
but i am unhppy it failed to install in usb hdd.
where as ubuntu 13.10 installed in usb hdd.

[oldfred]

Have you installed in UEFI or BIOS boot mode.
And have you installed in the same boot mode for both installs?

Are you using Something Else or manual install so you do specify to install grub2's boot loader to the external drive?

How did it fail to install?

Toshiba laptop C850 Windows 7 with upgrade to 8 version - sudodus
http://ubuntuforums.org/showthread.php?t=1769482&p=12606025#post12606025

This does not have to be just a flash drive:

Flash drive to boot in UEFI or BIOS - sudodus
https://help.ubuntu.com/community/Installation/UEFI-and-BIOS

[ramaswamyps]

i use legacy boot from bios. i have the OEM windows 7 and windows 8 and windows 8.1 and gentoo linux all boot from windows 8.1 menu.
i have not installed grub to my internal hdd.
now i installed grub to usb hdd. i now have selective boot to ubuntu only when i connect usb drive.
usb stick is so slow got tired in half of an hour of usage. then i made the dvd and tried the 4th installation trial. it worked.
now all good.
thanks for reply
oldfred :)