3000T Buster Issue?

[AppleIIGuy]

http://www.e3b.de/usb/main_faq_e.html#DMA_BUSTER_9_11

Most important issue: Buster 11 allows only one active busmaster (details can be found here). Take care especially in the A4000T: the internal SCSI controller is basically a A4091 and counts as busmaster!
If your system has Buster 9 mounted, you can operate the Fastlane Z3 as additional busmaster besides DENEB in DMA mode. Moreover, the Buster9 mode must be activated in Poseidon, or if started from FlashROM, the Buster9IdTag must be included into FlashROM. Details on this issue can be found in the Poseidon manual.

If the Fast ATA is a Busmaster Card you could configure the Deneb to not be busmaster.