The GNU list server is a monster machine serving lists.gnu.org, lists.nongnu.org and a few other domains. Every day, it spools out over 1 million messages for 2700 mailing lists. Until April 11, our venerable list server was an 8-year old Fedora Core 2 (!) box equipped with 6 high-speed SCSI drives organized in two RAID packs to maximize I/O bandwidth. These drives were incessantly cranking every day, as Mailman forwarded incoming posts to thousands of subscribers over a saturated T1 uplink at the FSF headquarters.