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Related question: Why does integrity check fail for the 12.04.1 Alternate ISO?

I downloaded and wrote ubuntu-12.04.3-server-amd64.iso to a USB key, but when I boot from it and select "Check disc for defects", I get the error: "The ./boot/grub/efi.img file failed the MD5 checksum verification..."

I'm using OS X, so the steps for writing the ISO to the USB key are as follows:

hdiutil convert -format UDRW -o ubuntu-12.04.3-server-amd64.img ubuntu-12.04.3-server-amd64.iso
sudo dd if=ubuntu-12.04.3-server-amd64.img.dmg of=/dev/rdisk1 bs=1M
diskutil eject /dev/disk1

The MD5 for the ubuntu-12.04.3-server-amd64.iso is OK, md5 ubuntu-12.04.3-server-amd64.iso gives MD5 (ubuntu-12.04.3-server-amd64.iso) = 2cbe868812a871242cdcdd8f2fd6feb9 which is the same as the MD5 on the Ubuntu website.

Is this the same issue as the question linked above? Can I proceed OK?

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Where is the ./goot/ coming from? Or did you mean ./boot/? –  Thomas W. Jan 11 '14 at 19:17
@ThomasW. corrected, thanks. –  Douglas B. Staple Jan 11 '14 at 20:46

1 Answer 1

I'm having the same problem with 14.04 server. The integrity check isn't the only problem (the install outright fails at the installing bootloader step which is why I rebooted to run the integrity check).

I've tried creating the USB in both Windows and OS X, using multiple USB drives and multiple tools in each, including the DD method in OS X. Seeing as I don't have enough reputation to vote the question up or comment, adding this is the only option I can think of to let Ubuntu know this still needs to get fixed.

share|improve this answer
In my case there was in fact nothing wrong with the image. The issue was that, apparently, Ubuntu images are created for a single image type, see askubuntu.com/questions/180218/… –  Douglas B. Staple Apr 4 '14 at 16:04

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