Patent ID: 6496791
Filing Date: 2002-12-17
Classification: G06F

Abstract:
A tape drive emulation interface, redundantly connecting a plurality of host channels to a main processor and a backup processor, each processor having a systembus of a tape drive emulation system, said interface comprising:a chassis having a plurality of slots, with each slot having at least first and second connectors; a plurality of dual systembus base boards, each coupled to one of said slots; a plurality of channel interfaces disposed on each dual systembus base board, each channel interface for intefacing a host channel to input/output buffers of the main processor; a first bus expander, coupled to the first connector of said slots, for multiplexing said plurality of dual systembus base boards to a first bus expander port; a second bus expander, coupled to the second connector of said slots, for multiplexing said plurality of dual systembus base boards to a second bus expander port; a first set of signal lines coupling said first bus expander port to said main processor systembus; and a second set of signal lines coupling said second bus expander port to said backup processor systembus.