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I have a task for university to deal with EXT2 file recovery. The problem is that the example drives (as IMG files) we got only contain one block group. I want to test if I read the drive correctly so I need more than one block group.

I tried to create an IMG file from my Kubuntu USB drive but did not manage to do it. I searched online but found not a single IMG file to download. Google only wanted to sell some ext2 drivers to me.

Where can I get an ext2 IMG file from?

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  • This is a question you should ask your professor/TA. Most certainly all you need is contained in the given image. By thinking "outside the box" you are likely to approach the task in a way that is unnecessary cumbersome. Commented Dec 17, 2023 at 1:04

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Not sure what you mean about block groups, but if I wanted an ext2 image I would first create an image file:

fallocate --length 1G test.img

This will create the file test.img in the current directory and uses the --length option to specify the image should be 1 gigabyte in size.

Then, create an ext2 filesystem onto the image:

mkfs.ext2 ./test.img

Now, you have an ext2 image you can mount and manipulate:

mount ./test.img /mnt/img

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  • fallocate did not work for me, but I used this command. For some reason I was not able to create a file bigger than 128MB. dd if=/dev/urandom of=/mnt/d/image.img count=128 bs=1M Commented Dec 17, 2023 at 3:45

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