[Dovecot] Maildirs++ on ext4

[Rodolfo Gonzalez Gonzalez]

Hi,

happy after migrating from Courier to Dovecot without major issues, and 
saving 3 Gb of RAM after the migration, now I'm going to move everything 
to a 5 Tb RAID6 array. There's another thread on SATA and cluster fs, 
but for now I'm looking for the best filesystem in your experience. 
Currently I use Reiser, but I'd like to know if someone has worked with 
ext4 and Dovecot's maildir++.

Thanks.

P.S. I have UPS and generator, but my RAID card doesn't have backup battery.