linux-ext4 - [Bug 114821] Frequent and recurring ext4 "bad header invalid magic" errors on a healthy drive

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Message-ID: <bug-114821-13602-qUviac8L8F@https.bugzilla.kernel.org/>
Date:	Fri, 18 Mar 2016 05:17:17 +0000
From:	bugzilla-daemon@...zilla.kernel.org
To:	linux-ext4@...r.kernel.org
Subject: [Bug 114821] Frequent and recurring ext4 "bad header invalid magic"
 errors on a healthy drive

https://bugzilla.kernel.org/show_bug.cgi?id=114821

--- Comment #2 from Lukas <dse.ssd@...il.com> ---

I was suspecting hardware problems initially, but now I don't think that's the
case - both short and long SMART self-tests as well as vendor diagnostic tests
(including a 10 hour scan of every sector) produced no errors. All SMART
attributes that would indicate electromechanical failure are at zero raw
values.

I've also just verified that the 'clunk sound' is a head load cycle. By copying
a certain file I can trigger the error and if I check the SMART attributes
before and after, I see the 'Load Cycle Count (ID #193)' increased by 2.
Currently it is at 1823.

Unfortunately, I'm not skilled enough to quickly test with a vanilla kernel on
the same OS. Would it be useful if I'd tested using Raspbian Jessie with 4.1
kernel instead? I can exchange the SD card with the OS while keeping everything
else the same.

The stackexchange post is indeed mine and I have not posted this to the
linux-ext4 mailing list. Should I do so? I apologize if I'm doing things out of
order here, I have little experience in official linux bug reporting.

Attaching dmesg ans syslog files.

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