в мане сказано:
A directory with the 'T' attribute will be deemed to be the top of directory hierarchies for the purposes of the Orlov block allocator. This is a
hint to the block allocator used by ext3 and ext4 that the subdirectories under this directory are not related, and thus should be spread apart for
allocation purposes. For example it is a very good idea to set the 'T' attribute on the /home directory, so that /home/john and /home/mary are
placed into separate block groups. For directories where this attribute is not set, the Orlov block allocator will try to group subdirectories closer
together where possible.
Я не очень понял, что это такое и зачем его ставить на /home ?
