World doesn't save with ramdisk enabled

[Gethec]

I'm running a Bukkit server on an Ubuntu 13.04 VM. When I enable the ramdisk feature, everything runs perfectly, but the world isn't saved from ramdisk to HDD. I've tried multiple permutations of saving then restarting or stopping/starting the server, but the world always reverts on relaunch. If ramdisk is enabled, everything saves just fine, but I like the load speeds ramdisk provides. Any ideas on what's causing the issue?

[LiaraAlis]

I can confirm that issue. for me too… no ideas?

[tgladding]

Do you have the cron job installed to copy the ramdisk world to disk every 30 minutes?

# Regular ramdisk to disk saving
#
*/30    *   *   *   *   /etc/init.d/minecraft to-disk