Recurring Problem with Lacie D2 Quadra Firewire. Daisy chaining FW400 and FW800?

[MOGAZI]

Hi there,
First of all here's my setup: IMac G5 (1 FW 400, 1 FW 800), Lacie D2 Quadra (1 FW 400, 2 FW 800), Digi002 (FW 400).

At first I had both the Lacie and the Digi002 connected directly to the computer respectively via FW800 and FW400. Unfortunately after just a couple of months the FWPorts on the Lacie died (USB working fine).

I sent it for repair and when I got it back I daisy-chained as follow:
iMac-->FW400-->Digi002-->FW400-->Lacie
But in this configuration the drive lasted even less. After less than a month I got a message saying the drive had been improperly removed and the firewire was gone again. Now I'm waiting for them to fix it yet another time. But I'm wondering if I'm doing something wrong...
I know Digidesign recommends to place the drive between computer and Digi002 but that was the only way I could daisy chain using FW400.

Would it be possible to connect:
iMac-->FW800-->Lacie-->FW400-->Digi002
or would it be better
iMac-->FW400 adapter to FW800-->Lacie-->FW400-->Digi002

Thanks!