[Novalug] Ext4 != Ext4. Is XFS == XFS?

Aaron M. Ucko amu@alum.mit.edu
Fri Dec 9 13:12:45 EST 2016

James Ewing Cottrell III via Novalug <novalug@firemountain.net> writes:

> What I mean is, if I create an ext4 fs with RHEL6, I can't read it
> with RHEL6; nor can I read a RHEL6 ext4 fs with RHEL5. The reason is
> that newer systems use newer features, which are unknown to older
> systems.

Have you tried adjusting the set of enabled features, via either the -O
flag or mke2fs.conf?  ext4(5) documents the available choices.

I don't know how XFS compares on this front, but wouldn't be surprised
if the format remained constant for compatibility with IRIX.

Aaron M. Ucko, KB1CJC (amu at alum.mit.edu, ucko at debian.org)
http://www.mit.edu/~amu/ | http://stuff.mit.edu/cgi/finger/?amu@monk.mit.edu

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