SATA CABLES(Serially Advanced Technology Attachment)

Seminar by

DARSHAN R1DS10EC40

2

1. General Overview

2. Physical Structure.

3.Protocol .

4. Need and Benefits of SATA

5.Difference between SATA and PATA

6. e SATA

7 .Limitations of SATA

8. SATA II

9. Future Scope

Contents

General Overview Serial ATA (Advanced Technology

Attachment) is a computer bus technology primarily designed for transfer of data to and from a hard disk

Physical Structure

A+ = Transmit pin-1 B+ = Receive pin-1

A- = Transmit pin-2 B- = Receive pin-2

Protocol

4 Application layer

3 Transport layer

2 Link layer

1 Physical layer

Need and Benefits of SATA

Increased data transfer rate ,

Supporting 1.5 Gbps date rate

Easy cable management and cable

length

Increased airflow

Size of SATA connector is smaller than

PATA cables

Differences between PATA & SATA

Up to 133 Mbytes/sec Up to 1.5 Gbits/sec

Tiny jumpers No master/slave, point to point

Eighteen-inch cable Up to 39-inch (1 -meter) cable

Two-inch-wide ribbon cable Thin cable (1/4-inch)

80 conductor 7-wire differential (noise canceling)

40 pin and socket Blade and beam connector (snap in)

Two-inch-wide data connector 1/2-inch-wide data connector

High 5V tolerance for legacy drives Low voltage (.25V) tolerance

CRC on data only CRC on data, command, status

Parallel ATA Serial ATA

E-SATA Initially SATA was designed as an internal

interface technology, bringing improved performance and new

features to internal PC or consumer storage .Creative designers

quickly realized the innovative interface could reliably be

expanded outside the PC, bringing the same performance and

features to external storage needs instead of relying on USB or

1394interfaces called external SATA or eSATA,

LIMITATIONS OF SATA

Drivers and support There are only a few small disadvantages of SATA over PATA. One disadvantage is that SATA hard drives will sometimes require a specific driver to be loaded to a computer when installing an operating system, in order for the computer to utilize the SATA hard drive

SATA II & SATA III SATA-II.which is an extension to the

original SATA standard is seen as the bridging technology from a desktop-oriented SATA to a server-level storage interface, making it a viable, low-cost storage solution for server, NAS and SAN applications.

SATA III, is the next set of specifications following the original SATA and SATAI II storage interface specifications. SATA III doubles the maximum data transfer rate for previous Serial ATA storage interface specifications from 3 to 6 Gigabits per second (6 Gb/s), enabling faster data transfer speeds between storage units, hard drives, optical drives and protocol host bus adapters(HBAs).

Future Scope

SATA-IO plans to make a 6.0 Gb/s standard. Although the theoretical throughput would be doubled, conventional hard disks cannot approach saturating this speed. The 6.0Gb/s standard will however be useful in combination with port multipliers, which allow multiple drives to be connected to one Serial ATA port, as well as with solid-state drives such as RAM disk.

Thank you

Questions..?