Journaling and indexing
From NAS-Central Buffalo - The Linkstation Wiki
Start by downloading tune2fs from http://www.kurobox.com/downloads/gentoo and FTP it to /bin on your kuro which should still be in EM mode.
format as ext3
mke2fs -jv /dev/hda1
enable full journaling and indexing
#tune2fs -O dir_index /dev/hda1 #tune2fs -O has_journal -o journal_data /dev/hda1
tune startup checks
#tune2fs -c 90 -i 120 /dev/hda1
Repeat these steps for the rest of your partitions except your swap partition (/dev/hda3 and /dev/hda4 if you are using the scheme in the Gentoo how-to). When you are done with all of your partitions click here to be returned to the Gentoo Install instructions.

