http://web.mit.edu/tytso/www/linux/e2fsprogs.html
http://e2fsprogs.sourceforge.net/
http://web.mit.edu/tytso/www/linux/ext2.html
http://www.linux.or.jp/JM/html/e2fsprogs/man8/e2label.8.html
http://www.linux.or.jp/JM/html/e2fsprogs/man8/mke2fs.8.html