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

James Ewing Cottrell III jecottrell3@comcast.net
Fri Dec 9 11:53:33 EST 2016

OK, obviously I've go some 'Splainin' to do...

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.

In other words, it's not Upward Compatible.

Is this true of XFS as well? Is it Upward Compatible, or will earlier OS 
versions be confused when trying to read ones created by newer OS versions?


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