Gentoo Archives: gentoo-user

From: n952162 <n952162@×××.de>
To: gentoo-user@l.g.o
Subject: [gentoo-user] help with boot msgs and ext[2-4] question
Date: Tue, 17 Mar 2020 12:51:13
Message-Id: 0eae12ea-a04f-cbb7-6533-e463eb6a5232@web.de
Hello,

I see this msg in /var/log/dmesg:

[    4.444826] EXT2-fs (sdb3): error: couldn't mount because of
unsupported optional features (2c0)
[    4.468074] EXT4-fs (sdb3): mounted filesystem with ordered data
mode. Opts: (null)

but my system boots.  Is the (2c0) the clue to what features are meant?

Next question:

 From this article:

/https://opensource.com/article/18/4/ext4-filesystem/

I get a good description of *journal*, *ordered* and *writeback*
journaling levels and I wonder if my root filesystem should have
*ordered* mode.   I recently had a total crash of my ext3/4 root and
home filesystems, where the directories were lost and I had to paste
everything back together again by guess and by golly.  In decades of
linux usage, that's never happened to me on that scale.  I'd hoped for
more from journaling filesystems.

Did it happen only because gentoo gave me *ordered* data mode by
default  and I should have had *journal*?