linux-ext4 - [Bug 211733] ext4 file system unrecoverable corruption

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Date:   Wed, 17 Feb 2021 16:37:59 +0000
From:   bugzilla-daemon@...zilla.kernel.org
To:     linux-ext4@...r.kernel.org
Subject: [Bug 211733] ext4 file system unrecoverable corruption

https://bugzilla.kernel.org/show_bug.cgi?id=211733

--- Comment #3 from Theodore Tso (tytso@....edu) ---
Free advice?   Before you do anything else, back up *everything* before you
even breathe on the system.  You may think it's not going to reproduce again,
but if it does, you may end up losing more data.

I tend to keep things very simple.  Which is to say, I try not dual-boot
Windows and Linux, and if I do, I use separate HDD's for the Windows and Linux
systems.   So if I were doing anything like this at all, I'd boot into a Linux
system, and then copy everything from the Windows partition to the Linux
partition in a single go, and then be done with it.   The KISS (Keep things
simple, stupid) principle is always a good way to follow especially with
valuable data.

And we're only talking about a 500GB HDD.  Getting a second 500GB disk, or for
that matter, an external 1TB HDD or even SSD, is cheap, compared to the value
of your time.

Backups.  Backups.   Backups.   I've worked at MIT, and seen a graduate student
lose ten years worth of their research data due to lack of backups.   One could
perhaps claim that someone who was dumb enough not to make backups doesn't
deserve to have a Ph.D., but regardless, it's still a tragedy; and totally
avoidable.

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