15-11-2012, 01:33 PM
Native Command Queuing (NCQ)
Native Command Queuing.pptx (Size: 709.45 KB / Downloads: 25)
Parallel Advanced Technology Attachment
limitation of Parallel ATA
limitation of Parallel ATA is the difficulty in increasing the data rate beyond 100 MBytes/s.
Parallel ATA uses a single-ended signaling system that is prone to induced noise
NEED FOR SATA
The 5-volt signaling requirement and high pin count (40-pin cable connectors)
The 18-inch cable length limitation; cable width and cable routing problems
Data robustness issues
BENEFITS OF SATA
Serial ATA is faster
Reduction in voltage
Cabling
Improved Data Robustness
Backward Compatibility
Increased Disc Drive Data Rates
Serial ATA Integration
Connectivity
LAYERING MODEL
The Transport and Link layers control overall operation.
Application layer is designed to maintaining software compatibility
The Physical layer handles the high speed serial communications between the host and device.
Serial ATA Communications Layer Model