Filesystem won't mount because of "unsupported optional features (80)"

[Maurice Volaski]

>On Sat, Feb 17, 2007 at 05:53:56PM -0500, Maurice Volaski wrote:
>>  Indeed, it appears that my initial assumption is correct. mke2fs
>>  contains ext4dev code and it erroneously applies the 64bit flag to
>>  filesystems > 2 TB by default.
>
>Are you using the e2fsprogs-interim patchset version
>e2fsprogs-1.39-tyt1?  It should only be used for ext4dev development,
>and nothing else.  I'll look at fixing that bug in
>e2fsprogs-1.39-tyt1, but that code base has a bunch of interim patches
>that I'm currently in the process of reworking for e2fsprogs mainline
>inclusion; it's there only for the convenience of ext4 developers.
>
I'm using Gentoo and it has e2fsprogs-1.39-r1. It says at 
http://bugs.gentoo.org/show_bug.cgi?id=156697 that this version 
contains a number of ext4 patches, but I'm not certain if it is 
equivalent to tyt1 or not.
-- 

Maurice Volaski, mvolaski at aecom.yu.edu
Computing Support, Rose F. Kennedy Center
Albert Einstein College of Medicine of Yeshiva University