2.5.1. New Default File System: XFS
XFS is a very high performance, scalable file system and is routinely deployed in the most demanding applications. In Red Hat Enterprise Linux 7, XFS is the default file system and is supported on all architectures.
Ext4, which does not scale to the same size as XFS, is fully supported on all architectures and will continue to see active development and support.
188.8.131.52. Changes to mount options
Unlike ext3 and ext4, the XFS file system enables the
acl mount options by default. This means that you will encounter errors like the following if you include these options at either the command line or in
$ mount -o acl /dev/loop0 test
mount: wrong fs type, bad option, bad superblock on /dev/loop0,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so.
Ext3 and ext4 file systems do not enable these attributes by default, and accept these options when you use the
mount command or mount them with