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Description / Abstract:
This standard defines a scalable interface for use with
memory-mapped storage units and other devices. The term "storage
unit" can encompass rotating, non-rotating, volatile, and
non-volatile storage. Issues of concurrency, latency, bandwidth,
extensibility, and negotiation will be addressed. The interface is
intended for use with either a single storage unit or with many
coordinated storage units.
Purpose
This standard provides an efficient physical-layer independent
interface architecture for storage units that attach directly to
memory access buses. In this interface model, storage units have an
attachment to main memory, rather than an attachment to an
input/output (I/O) channel. This simplifies the storage unit design
and supports scheduling of data transfers spanning large numbers of
units.