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*?
