SATA2.0 and SATA3.0 hard drive speed difference how much

The theoretical data for SATA2.0 and SATA3.0 hard drives are quite different, however, the actual use of the platform itself and the control of the system, as well as different applications to determine the actual use of the results, and through some network of actual test data collected to show SATA2.0 and SATA3.0 hard drive speed difference is not very clear Explicitly

Theoretical SATA2.0 interface rate is 150mb/s, and SATA3.0 interface rate: 300mb/s, the actual test results vary greatly from the following data, data from the network, not measured data, not the accuracy of the data to make any guarantee, for reference only.

　　Bottom test: HD tach Contrast

HD tach read speed test does not depend on the file system, curve performance is basically equivalent to the internal transmission rate test. The embodiment is very idealized hard drive speed, its extension part is approximately the disk performance table buffer to disk project's reflection, but in the real application, very few opportunities achieves this height.

HD tach average read speed test

From the HD Tach test, the Seagate SATA3.0 hard drive has the same performance as the SATA2.0 hard drive in the average speed test, and also leads the western data 100 million to the Raptor hard drive. Visible in the traditional hard drive, the performance gap between SATA2.0 and SATA3.0 is small.

HD Tach Burst Rate speed

In solid-state hard disk test, the SATA3.0 interface SSD performance has broken through the 300mb/s performance limit of SATA2.0, that is to say, the theoretical transmission rate of SATA3.0 is beginning to play. and SATA2.0 SSD by virtue of its own construction advantages, in the reading is also leading a lot of traditional hard disk.

Burst rate, the first SATA3.0 SSD to achieve 350mb/s, the performance is amazing. Limited by the SATA2.0 interface, Intel's V-series solid-state drives can only reach 260mb/s.

　　Bottom test: HD tune Pro v3.50

HD Tune Pro is a disk performance diagnostic test tool. It can detect the transmission rate of disk, burst data transmission rate, data access time, CPU utilization rate, health state, temperature and scanning disk surface.

HD tune average read speed test

From the HD Tune average reading speed test, we can see that the response of several groups of data and HD Tach the same, mechanical hard disk SATA3.0 and SATA2.0 is not the essence, but the solid State drive group performance difference is obvious, SATA3.0 let the United States light C300 solid-state hard disk speed close to 300mb/ S, has approached the SATA2.0 interface specification.

　　Applied Energy test: FastCopy

FastCopy is a compact file/directory Copy tool that is powerful, superior, capable of fully exploiting file systems and hard drives, and supports counting and timing. Here are two directories to test: The first is a "Drivers" directory containing 12,645 files totaling 4998MB, and the second is a "Hdvideos" directory containing 2 files with a total capacity of 3620.9MB. The ability of file hard disk to cope with a large number of small files and bulk file copies is examined separately.

FastCopy Copy Time Comparison

The project mainly embodies the difference between the traditional hard disk in SATA3.0 and SATA2.0, after all, SSD solid-state hard disk writing is not very stable, so the data of the test is very different. From the test, the Seagate's SATA3.0 2TB hard disk and SATA2.0 1TB hard disk in the file copy of similar results, can also be intuitive to see the advantages of SATA3.0 is not reflected.

　　
Full Text summary

In fact, from the PATA to the SATA interface, SATA1.0 and SATA2.0 are not fundamentally different, just SATA2.0 joined the NCQ Native command queue function-the function through the sequence of read and write instructions to improve disk performance, However, because SSD's storage mechanism is completely different from the traditional hard disk, the NCQ function is completely useless. From the theoretical value analysis, SATA 1.0 defined data transmission rate of 1.5gb/s, so that the theoretical transmission rate can reach 150mb/s, and in the SATA2.0 era, this theoretical value doubled to 300mb/s. But take the actual speed of the current mainstream hard drive to judge, have not reached the peak of SATA1.0, let alone SATA3.0.

SATA Interface Close-up

By testing, it can be seen that SATA3.0 's traditional hard drive performance is very disappointing, even slower than the ordinary SATA2.0 hard drive in the actual process. Whether the bottom of the speed test, or the actual file copy test, SATA3.0 hard disk has not played the advantage of doubling the bandwidth, but the speed and SATA2.0 hard disk similar, and some projects are not as good as SATA2.0 hard disk performance. So is SATA3.0 really worthless?

In fact, from the evaluation data, SSD hard disk in the SATA3.0 interface, whether the average read speed or burst rate, have made great strides. Take the United States light C300 solid-state drives for example, in the HD tach test, the speed has reached the SATA2.0 Peak 300mb/s, outstanding performance. And compared to the SATA2.0 interface solid-state hard disk also has a significant increase, visible SATA3.0 interface is more suitable for SSD solid-state drives.