Oh, sorry, I thought the limit cannot be reached that easy in case of
sparse files full of unalocated blocks. Apparently the limit includes
the unallocated space.

I retested that again and the sparse file really gets truncated to 16TB
and I believe that's exactly the moment when the tool should report some
error like: "Unable to create sparse file of that size! Unsupported by
the target filesystem."

Instead of that the tool continues to extract data and after a long time
it fails with Invalid argument.

To prevent confusion, would it be possible to modify the code to make it
fail immediately when it fails to create the sparse file of the required
size?

Thank you.

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https://bugs.launchpad.net/bugs/2063369

Title:
  e2image reports invalid argument when used with big partitions

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