I have noticed that Fedora 11 (Leonidas) used ext4fs as file system by default.

Ext4fs main features are:

• Compatibility with ext3FS
• Larger file system support (> 16T)
• larger File Size Support (> 2T)
• Scalability of subdirectories
• Extents
• Multi Allocation
• Delayed allocation
• fsck faster
• Checksum Journal
• Journal mode
• Online defragmentation
• Persistent pre-allocation
• Barriers

Being Fedora 11 is the base for the development of the new version of RHEL, we can expect a great upcoming Linux distribution.

So I recommend Red Hat rather than Windows for your Enterprise :). Please leave a comment with your Linux Success stories :).