Connecting Drobo to XServe via FW800

I have a 2x Dual-Core Xeon XServe, running OS X Server 10.6.3, and a DroboPro. I was able to succesfully connect the Drobo, but data transfers turned up FireWire errors. They show up on Console, but don't pop up as drive errors. The errors trace to the method
IOFireWireSBP2ORB:prepareFastStartPacket
in
IOFireWireSBP2ORB.cpp
(the error mesage is "fast packet start length < orblength)")
Unfortunately, after having spoken with both Apple Enterprise Support and Drobo support, no one has given me a solution. Apple indicated that the problem is known, however; unfortunately, they have no front-facing information. Drobo didn't know about the problem. Apple stated that the problem may have to do with memory (my XServe has 32GB). I was not able to reproduce the error on a MacBook Pro, but it had much less RAM.
Anyone else having this problem? The best IO I can do right now is iSCSI, which is not as fast (in theory it should be, but that's ignoring overhead). iSCSI is only marginally faster than USB.

Hi there,
Just to let you know that I have just purchased and configured a DroboS and I have exactly the same problem with my Mac Pro running Mac OS X 10.6.3 client. Connectivity via USB is fine, but FireWire 800 causes a Finder error -36 upon reading a file, and yields exactly the same kernel logging of FireWire errors:
B<0x11082900>::prepareFastStartPacket - fast start packet not full, yet pte doesn't fit
kernel[0]: IOFireWireSBP2ORB<0x11082900>::prepareFastStartPacket - fast start packet not full, yet pte doesn't fit
--- last message repeated 27 times ---
My DroboS has current firmware (2.0.1) and I am using the current Drobo Dashboard (1.6.8). I have completely reset the DroboS several times, reformatted the volumes, and tried different cables and ports. There are no other devices on the FireWire bus, and other devices do not experience any issues.
I have had no luck with Data Robotics Support yet - they just tell me to check cables and ports again
Will post again if I make any progress, but otherwise I will return my unit because USB is far too slow (~20 Megabytes per second). eSATA is not even an option on most Macs either.
Cheers
Tim

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Hi,
I recently purchased a Drobo 5D and, after setting it up plugged directly into my Macbook Pro via USB, plugged it into my Time Capsule (3rd Gen, firmware 7.6.4) via USB.
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Bugger. I'm sure I've read about other people using it in this manner, albeit with other issues - at least their disks were showing up! Maybe they just got ultra lucky.
Do the airport extremes have the same problem? Again, I know I've read about people using them successfully... but if it's touch and go maybe I'll hunt down another router.
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Drobo
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Write
Read
Write
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Write
Read
Wifi (via TC)
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16.6
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Ethernet (via TC USB2)
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52.6
17.0
50.2
16.8
USB2
25.1
28.4
32.1
16.1
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Connecting Drobo to XServe via FW800

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