Jumbo frames?

Does anyone have any info on this. I too need to find out if I can have the machines plugged into the LAN ports set at 9000 MTU - I have a new iMAC connected to the the TC. I can get 900mbits/second to my MacBook Pro connected to another gig switch which the WAN port of the TC is connected to. But when I try to test to a Linux box on the same gig switch I only see ~500mbits/s. If I enable 9000 mtu on the iMAC the traffic does not seem to flow through the TC. I have noticed also that flow control is turned on using auto negotio but I don't see a flow control option on the TC.

I can not find anything officially from Apple on this but I suspect that like the Apple AirPort Extreme Base Station with Gigabit Ethernet (MB053LL/A) it does not support Jumbo Frames.

Which *****, along with not being able to partition it, No QoS, and other limited router features as well as limited NAS functions.

For the Money the Drobo ( http://www.drobo.com/ ) supports Jumbo Frames, works with TM and you can setup a partition size for TM, plus it can grow as your needs change or you run out of space, and it has full NAS features like ftp,ssh, itunes server, etc..

I own a 500gb TC but will be moving to the Drobo, it just fits my needs better.