From: Phillip Susi <psusi@cfl.rr.com>
Subject: 64bit filesystem questions
Date: Thu, 09 Jun 2011 10:36:04 -0400
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I was checking up on the support for 64bit ( > 16 TB ) fs support in the 
next branch last night and have a few questions:

1)  Why is blocks_per_group limited to 32k ( more specifically, 8 x 
blocksize )

2)  Why can't 64bit be enabled explicitly ( with -O or -E? ) instead of 
automatically when needed and the enable automatic 64bit setting is in 
mke2fs.conf?

3)  Why does 64bit disable the resize inode?