Journaling and indexing
From NAS-Central Buffalo - The Linkstation Wiki
There have been problems reported setting up Full Journalling and Indexing. It appears that the -o option of tune2fs is not supported by the flash kernel of the Kuro (2.4.17). Unless you know what you are doing, it is strongly recommended that you click on the back button and continue with the standard Gentoo install.
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.