How to correctly test the accurate speed of SSD[Win11 Solutions]
10 2021-08-21 00:10
In this article, I don't want to talk about any information about the test software settings, machine how to recover deleted photos from hard drive configuration, and test results. I just explain in principle what points need to be done to test how to recover deleted photos from usb drive the "real" performance.
Definition of test: Not to show the best score, but to get the most realistic how to recover deleted photos from usb free result.
A. Basic concept: (must know)
1.The performance of solid-state hard drives and how to recover deleted photos from usb stick mechanical hard drives will be affected by the data structure of the transmission: continuous transmission?Random how to recover deleted photos on a usb transmission?Transfer file size?Queue depth?and many more.
2.Unlike mechanical hard drives, how to recover deleted pics from hard drive the performance of solid state drives will also be affected by the structure of the previously how to recover deleted pics from usb drive written files.
B. System settings to be considered before the test: (directly affect the test how to recover deleted pictures from hard drive results)
1.Advanced Host Controller Interface (AHCI) and driver.
2.Native Command Queuing (NCQ) and how to recover deleted pictures from usb drive queue depth.
3.Whether the offset value is aligned with the partition.
4.The operating system's how to recover deleted usb files on mac influence in the background.(Antivirus, monitoring software, etc.).
5.Start disk test or slave disk how to recover deleted usb files on windows test.
C. Garbage collection: (all SSDs must have)
1.NAND flash memory must be erased in block how to recover deleted video from external hardrive size before rewriting
2.When the data is overwritten, the original data is marked as "invalid" and how to recover deleted video from hard drive the new data is written to a different address.
3.When all the blocks are written once, the SSD how to recover deleted video from usb drive must gather all the "valid" data to the new address and delete the "invalid" data in the original how to recover deleted videos from hard drive address.
4.The old block is erased, this block can be recycled-welcome the next write operation.
5.Such how to recover deleted videos from usb drive cyclic operation brings extreme consumption of bandwidth and seriously affects the performance how to recover deleted word doc from usb of SSD.
1. When we buy back a new SSD, the NAND flash memory in the SSD has been erased and can be how to recover deleted word documents from usb directly written to the data.
2. At this time, writing data does not need to be garbage collected. how to recover desktop files from hard drive (There is enough blank NAND to write)
3. Running the test software in this state, the test results how to recover documents from a broken usb are very high.(Also impractical)
E. Three states of solid state drives: factory state, GC state, how to recover documents from external hard drive stable state.
To test the true performance of an SSD, it depends on the steady state.(If the household how to recover documents from formatted hard drive level can refer to the GC state, the enterprise level only looks at the steady state performance)
F. how to recover emails from crashed hard drive The actual operations performed by the system and SSD are different.
G. The difference how to recover encrypted files external hard drive between Trim open and unopened directly affects OP's capacity.
H. The data structure written in the how to recover encrypted files from hard drive past will affect the performance of the SSD.
I. Relevance of test data:
1. Actual performance will how to recover erased data from hard drive vary by capacity used.The larger the available space = the larger the OP capacity, the stronger the how to recover erased external hard drive mac performance. (Trim support)
2. Many test software will fill up the entire hard drive before how to recover erased files from hard drive testing.(This is the worst-case test. I believe users can't use the entire disk capacity, so it's not the how to recover erased files on hard drive most scientific.)
3. Do HDD Erase before each test to restore the SSD to the factory state, so how to recover everything from a hard drive that the tests of different SSDs can be compared fairly.
4. Remember one thing: the purpose of the how to recover excel file from usb drive test, to understand a test software and your purpose, the closer to the daily operation, the better. how to recover external drive installed steam games
5. In applications, it is generally impossible to only read or write. Appropriate adjustment of how to recover external hard disk using cmd the read/write ratio can better reflect the actual performance of the SSD.
6. The most important how to recover external hard disk without formatting point, but also the most difficult: to understand the characteristics of the SSD algorithm to test.