SATA2 and SATA3 Interface Difference evaluation

SATA interface with the hard drive is also called serial hard disk, is the future of PC hard drive trend. SATA's biggest advantage is the high transmission rate. At present, mainstream solid-state drives are generally upgraded to SATA3.0 interfaces, the corresponding motherboard or notebook SATA interface has been popularized 3.0 specifications, while some old motherboards or notebooks are still more in the SATA2.0 era, then, the same is a SATA3.0 solid-state hard disk, SATA2 and SATA3 interface difference is what ?

The difference between SATA2 and SATA3

SATA3.0 also called sata6gbps,sata2.0 sata3gbps,sata3.0 is a new version of the specification issued by Serial ATA International (SATA-IO) in May 2009, with the main transmission speed doubling to 6Gbps, that is to say, The theoretical speed of SATA2.0 and SATA3.0 interfaces is half the difference.

Flash di Extreme Speed Series Solid state hard disk support SATA3.0 6Gbps interface, with 120GB, 240GB, 480GB to choose from, the official nominal its maximum reading speed up to 550mb/s, the highest write speed up to 520mb/s.

Flash di Extreme Speed Series 240GB solid-state hard disk using aluminum alloy shell, the appearance of black and red logo is simple and generous design.

▲ Flash di Extreme Speed series 240GB Solid state HDD Front

From the label of the Flash-speed series 240GB SSD, the model is sdssdx=240g, the production date is April 21, 2012, the firmware version is R201 version, produced from China. Its power consumption for 5v/1a, as well as a variety of electronic products related certification.

▲ Flash di Extreme Speed series 240GB SSD hard back

Flash di Extreme Speed series 240GB SSD is a high-end flagship series of products, excellent performance and the price of 2000 yuan to make extreme speed SSD with high cost performance. It has an average time of no failure to reach 2 million hours, and enjoy 3 years of national service.

　　Flash 240GB Solid state hard drive dismantling

Flash di Extreme Speed series 240GB solid state Drive using a/b two-sided housing fastening protection, built-in 2.5-inch PCB board.

▲ Flash di Extreme Speed series 240GB Solid state HDD Front

Flash di Extreme Speed series 240GB solid-state hard disk using light blue PCB board, in order to save the design cost, the highest capacity of the 480GB version of the PCB board, so half of the flash chip location idle. In addition, the PCB board of the overall solder point full, clear wiring.

▲ Flash di Extreme Speed series 240GB solid state hard disk PCB back

It uses 8 32GB flash chips to build 256GB capacity, with the main control placed on one side. Due to the characteristics of the SandForce SF-2281 main control chip, the 50% capacity of one 32GB flash in 8 is made over-provisioning cache (cache), that is, the actual capacity is "256GB-16GB=240GB".

▲ Flash di Extreme Speed series 240GB solid state hard Drive main control

The main control chip for the current mainstream SandForce SF-2281VB1-SDC scheme, a new generation of SandForce master chip can be compatible with most of the market memory particles, support trim, NCQ and other optimization functions. Its interface with the mainstream SATA3.0, theoretically maximize the 6gb/s transmission bandwidth, so as to maximize the performance of solid-state drives.

▲ Flash di Extreme Speed series 240GB solid-state hard disk interface

Flash di Extreme Speed series 240GB Solid state hard Drive 8 of the industry's highest quality flash toggle DDR MLC Flash chip, a single chip capacity of 32GB, its manufacturing process of 24 nm, advanced manufacturing technology and high quality to bring faster, more stable, longer life of access efficiency.

　　As SSD benchmark contrast test

As SSD Benchmark is a software designed specifically for SSD testing. Can test the continuous read and write performance of SSD, including 4KB small file transmission performance, etc., performance display can be divided into two types, one is MB/s, the other is IOPS.

▲ Native SATA3.0 interface running points

▲ Bridge SATA3.0 interface running points

▲sata2.0 Run points

▲ Comparison Results

In the As SSD test, the Flash di Extreme Speed series 240GB solid-state drive uses the native SATA3.0 interface to achieve 511.70mb/s and 269.46mb/s in continuous reading and writing. It has a 4K multi-threaded read speed of 212.85mb/seconds and write speed of 218.69mb/seconds. The primary SATA3.0 interface is nearly one times more than the SATA2.0 interface in sequential reading alone.

▲ Native SATA3.0 interface running points

▲ Bridge SATA3.0 interface running points

▲sata2.0 interface Running points

▲ Contrast test

In 4KB file access, Flash di Extreme Speed series 240GB solid-state drives using the primary SATA3.0 interface of the random read ioPS value is 5577, and random write to 20098. Its multi-threaded read/write 4KB files have a ioPS value of 54491 and 55984, which is divided into 752 points. Although the running points here, in some data SATA2.0 than bridging SATA3.0, but it is undeniable that the use of native SATA3.0 solid-state hard disk performance improvement is particularly obvious.

▲ Native SATA3.0 Interface simulation copy file test

▲ Bridge SATA3.0 Interface simulation copy file test

▲sata2.0 interface emulation copy file test

Flash di Extreme Speed series 240GB solid-state hard disk using native SATA3.0 interface in as SSD simulation file copy test, ISO, program and game three different file forms of copy speed are 337.16mb/s, 183.23mb/s, 189.76mb/s. And the use of SATA2.0 interface speed and reaction time and the original SATA3.0 interface is very different.