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From: Stefan Monnier <monnier@iro.umontreal.ca>
Newsgroups: gmane.emacs.help
Subject: Re: Fix the destroyed disk image partition table in a raw image file
 using Emacs.
Date: Sun, 11 Apr 2021 16:58:45 -0400
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>> It's well known that Emacs is an 8-bit clean editor which makes it
>> safe to edit binary files. So, I want to whether I can fix the above
>> destroyed disk image file with Emacs for my scenario.
> There is hexl library:

As well as the `nhexl-mode` available from GNU ELPA.


        Stefan