AS-SSD how to look at 4k alignment

As SSD How to use? How do you look at 4k alignment?

　　About as SSD software:

As SSD is a professional SSD (SSD) transmission Speed Test tool, it can not only test the speed of solid-state hard disk reading, but also can detect SSD is 4K alignment, open Achi mode and so on.

As SSD tool interface

As SSD tool Compact, support XP, WIN7/8/WIN10 system, under XP need to install run. NET Framework 2.0 environment to use.

　　As SSD tool Test principle:

　　Continuous reading and writing test (SEQ)

As SSD will first in 16MB size, continuously write to the test partition to generate 1 1GB size files, and then read in the same 16MB units, and finally calculate the average score and give the result.

　　4K Random Single Queue depth test (4K)

The software generates a 1GB sized SSD test file in 512KB units and then randomly writes and reads the test at 4KB unit size within the LBA address range of the file until the range is run, and the average results are calculated.

　　4K Random 64 Queue Depth test (4K-64THRD)

SSD evaluation software generates 64 16MB test files and then writes and reads tests in 4KB as well as in these 64 files, and finally results in average scores.

　　Data access Time Test (acc.time)

The software takes 4KB as the unit size, randomly reads the entire address range (LBA), writes to 512B as the unit size, randomly writes to the reserved 1GB address range, and ends with an average score.

As SSD benchmark such testing software is more popular, and continuous reading and writing performance is the top, coupled with the manufacturer's data on the "fuel", so many players see the performance of SSD only read continuous reading and writing results, in fact, for SSDs, 4K randomness can be more important, Especially when SSD is treated as a system disk.

Finally as SSD based on his formula even scored, the following is the use of as SSD.

　　As SSD how to use how to look at 4K alignment?

As SSD is a small and practical free tool, the use of the method is very simple, the following steps.

1, first in the installation of the use of solid-state hard disk computer download installation as SSD tools (online Search, there are a lot to download, including English and Chinese version have).

2, after installation, open as SSD, and then click on the bottom of the "start " can detect the solid-state hard disk read speed, whether 4K alignment, open AHCI mode, etc., as shown in the following figure.

How to use AS-SSD

As shown in the figure above, read represents the SSD read speed and write represents the SSD write speed. The most important parameter of a solid-state drive is read-write speed, which is about performance. SATA 6Gbps solid-state hard disk theory limit speed of about 572mb/s (6000000000/10/1024/1024), currently with Atto may run to 550mb/s the highest speed (with SandForce main control run 100% compressible data), The continuity of most mainstream SSD can be 500+mb/s, but the continuous write speed is still difficult to break through the 500mb/s (incompressible data).

　　In addition on the left part:

Iastora-ok on behalf of AHCI mode has been opened;

The 1024-OK represents 4K alignment already open.

In a solid-state hard disk computer, it is necessary to start AHCI mode and 4K alignment at the same time in order to play the best performance of solid-state drives, if this does not open optimization, will not only affect the reading speed, but also affect the life of SSDs.

Generally speaking, the solid-state hard disk reads and writes the operation, reads the operation is obviously more than writes the operation, this proportion at the 10~20:1 level. Therefore, for the performance of SSD, first of all to see 4K Random Read the results, and then see 4K random Write and continuous reading of the results, the ability to write continuously is in the final line.