changing ext4 journal data mode with remount?
- by Amos Shapira
I'm tweaking ext4 file system for speed, one tweak at a time.
First tweak is to change from "data=ordered" to "data=writeback".
To test this, I execute "mount -n -o remount,data=ordered /" but I keep getting "mount: / not mounted already, or bad option".
From lots of google'ing I found many questions about similar problems and one answer circa 2001+ext3 which says that you can't change the journal mode with remount. Is this limitation still current?