What wrote the link records you are finding at 0FF8? That is a valid memory address but there would have to be some 1500+ active links for active link records to be found there. It sounds like what ever wrote the link records at FF8 does not recognize the actual size of the device memory.
Many devices that indicate an I2 engine DO NOT support the Extended 2F ALDB command.
What are the firmware revision levels of the EZIO2X4 and EZIO4O?