Ubuntu – Checksums do not match when creating a bootable USB stick

11.04diskusb-creatorusb-drive

Since karmic koala, I can't create a bootable USB. Always the same error, it arrives to 96% and then this error " checksums do not match". Also in lucid, meerkat and natty even with fresh install. Tried it with more than USB stick.

Am I doing somthing wrong? I did format the USB stick several times but no luck. It's 2Gb.
Now I lost my DVD drive on my laptop, and USB is my only option. Please help!

  1. I did try different USB sticks
  2. I did try unetbootin, with success, but when booting from USB and selecting check disk for errors within the unetbootin menu it gives me 1 error, so I didn't try actually to install the O. S for precaution reasons.

  3. I did try to launch disk creator from terminal with sudo and that gives the same error on 96% of the process.

  4. doing the check proposed by chen xiao-long, the codes result no match.

    suliman@suliman-laptop:~$ sudo mount -o loop /home/suliman/Documents/ubuntu-11.04-desktop-i386.iso /mnt
[sudo] password for suliman: 
suliman@suliman-laptop:~$ md5sum /mnt/casper/filesystem.squashfs
174bb50daab963e681d2dcd9603f737b  /mnt/casper/filesystem.squashfs
suliman@suliman-laptop:~$ md5sum '/media/8BE1-C58A/casper/filesystem.squashfs' 
e4129f8ff21860d978c911b3b394f807  /media/8BE1-C58A/casper/filesystem.squashfs

  5. if the usb port is faulty, how can i check that?

Best Answer

Using a Kingston 4GB Data Traveler USB stick I was getting the same checksum error.

Then as Jordon Bedwell (above) suggested I dropped the persistence file from 1GB down to 256MB and it went through without a hitch; or the checksum error popping up.

Used USB Startup Disk Creator from the menu. Using Ubuntu 10.04 LTS to make a 11.04 USB.

Thanks Jordon

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