SCSI - Small Computer System Interface

SCSI is a set of standards or something like a protocol to connect a computer and pheripheral devices. There are several features of it:

• SCSI is an intelligent interface , it hides the complexity of physical format. Every device attaches to the SCSI bus in a similar manner
• SCSI is a peripheral interface - it can connect to 8 or 16 devices to a single bus. There can be any number of hosts and peripheral devices but there should be atleast one host.
• SCSI is a buffered interface - it uses hand shake signals between devices, it can transfer only real data and does no error checking and correction. All those are done in a buffer.
• SCSI is a peer to peer interface- Communication can be from host to host , host to a peripheral device, peripheral device to a peripheral device