HDDs, SSDs and friends in the enterprise world

An earlier (~1982), and much more elaborate peripherals interface.
Defined commands, protocols, initiator/target operation mode.
Allowed attaching internal or external disks
supported chaining devices (with an address per device)
and sharing of devices between machines.
Later enhanced to work over networks:
- FCP - (SCSI over) Fibre-Channel (used in SANs).
- ISCSI - SCSI over IP

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