i'm trying to install Ubuntu. I don't know if it is important, but i'm trying to install it on external HDD.

In the end i have external bootable HDD which only displays:

error: file not found
grub recovery>

From the beginning:

• I've downloaded ubuntu-12.04-desktop-i386.iso
• I've used LiLi USB Creator (LinuxLive) to create bootable pendrive from that image
• I've bootet from it, it works
• I've clicked "Try ubuntu", it works too.

I've used GParted to look over drivers (disks)

My primary embedded disk is seen as /dev/sda

My attached external disk as /dev/sdb

My PenDrive as /dev/sdc

• I've created partitions on /dev/sdb

• Fist partition for system (over 200GiB)

• Second was there already (it's xsf, and i don't want to touch it :P)

• Third is extended partition, with 1 locital partiton (10GiB) for swap

• I've started installation

• i've choose "somethin else" in ... i belive secound screeb
• then is selected /dev/sdb as boot disk
• for first partiton of /dev/sdb i set i want ext3 file system, i've check "formattin" checkbox, and mount path set to "/"
• firs logical partiton set as swap partition

After installation finished, i restarted my computer. When i boot from my primary disc it's work ok, my previous operating system - vista - works ok. When i set my BIOS to boot from my external disc, i only get that message:

error: file not found
grub recovery>

• I've try to reinstall it, but didn't help...

In desperation, i've try to read a bit about that "grub recovery>" command-line and experiment a bit... I'm not sure if this has had any point, or if it give you some information (notice, that i don't know what i'm doing :P )

when i've type command:

insmod (hd1,1)/boot/grub/linux.mod

i've get message:

unknown filesystem

the same with:

insmod (hd1,msdos1)/boot/grub/linux.mod

the same with:

insmod ext3

but i get no message after command:

insmod ext2

...

notice that i really don't know what this command exactly do, but than i thought that maybe if i reinstall ubuntu with ext2 filesystem, it will work. I've done that, but symptoms are the same.

I've go back to that Live version of ubuntu, filesystem and basics directories seems to be present on /dev/sdb1 ... i'm completely unfamiliar with GRUB. I'm also don't know which wersion of GRUB it is, i hope there is only one version on ubuntu-12.04-desktop-i386.iso

Any help? Thax