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I have a system without a hard drive.
I've used the start-up disk creator to copy the 13.04 .iso to the usb. I've used the same USB on multiple systems to install to a second USB stick. On this system, it starts at the typical install screen

GNU GRUB version 2.00-19ubuntu2

I click on Try Ubuntu without installing and I get this

error: invalid cluster 149xxxxxx

and then I get a giant screen of text that looks like

[    30.xxxxxxxx] perf samples too long {350648 > 200000}, lowering kernel.perf event_max sample rate

When I Click "Install" at the Gnu Grub screen, I get the Ubuntu logo with the 5 dots below it and it stalls.

please help

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Is there anything I can add to this question to get some more feedback? – user239853 Jan 27 '14 at 3:06

I suspect the clue is "error: invalid cluster 149xxxxxx". I had something similar with the corrupted geometry of an SD card recently.

I used testdisk (TestDisk 6.14, Data Recovery Utility, July 2013) written by

Christophe GRENIER

It found and fixed the invalid clusters. But take care that you are talking to the correct device, or you will be very sorry!

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