In a bladed switch, the bandwidth available between ports on the same blade or the bandwidth across the backplane might be the bottleneck.
Today, many applications serialize parallel data across the backplane .
A serial backplane is easier to upgrade than a parallel backplane .
System architecture may require peer-to-peer transaction support, such as direct communication between two application servers across the switched backplane .
I believe the cabling should be the same and, if you have a backplane there, that interface would remain the same.
Your home PC needs the backplane and connections to handle USB and FireWire devices, game controllers, coaxial and composite video input from your cable TV or satellite box and so forth.
Eventually, standards emerged, the backplane became the backbone of the enterprise, and the islands of information began to join.
A backplane is a physical board that is typically integrated to the backend of an enclosure.
Lastly, availability is disadvantaged by a dependency on a common backplane between the storage managers.
Today, many backplane manufacturers develop a backplane for SCSI drives and a separate backplane for ATA drives.