It’s time to dissect some coy marketing-/geek-speak.
You might have heard of Linus Torvalds scathing remarks on ext4 delayed allocation. You might have also seen the kind of window-dressing, such as the following statement, that RedHat employs to gloss over the underlying issue with ext4:
By default, ext3 automatically forces newly created files to disk almost immediately even without fsync(). This behavior hid bugs in programs that did not use fsync() to ensure that written data was on-disk.
The worst thing, however, is that this is not merely an ext4- or Linux-specific problem but a historical oversight as ...