> On Tuesday, August 1, 2023 at 05:20:33 PM PDT, David Crayford 
 > <dcrayf...@gmail.com> wrote:
> What’s the difference between between channelized I/O and a rack of 
> x86 servers connected to a SAN using fibre channel driven by high speed HBAs?

PCIe was created specifically for PCs and IBM z16 chose to use that as their 
only channel technology. Channelized I/O for PC has been available for several 
decades and is not limited to PCIe. The IBM z16 can have up to 1,536 PCIe+ 
slots. 

As for x86 fiber channel connection to a PC, PCIe is only one possibility. 

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