![]() The additional compression test can measure the power of the SSD in response to compressibility of the data. This test should SSDs pose with Native Command Queuing (NCQ), differences between the IDE operation mode where NCQ is not supported, and the AHCI mode. ![]() The 4K-64 corresponds to the test Thrd 4K procedure except that the read and write operations are distributed to 64 threads. 4K test the read and write performance is determined at random 4K blocks. In Seq-test the program measures how long it takes to read a 1 GB file to write respectively. These tests are carried out without using the operating system cache. The synthetic tests determine the sequential and random read and write performance of the SSD. Two extra benchmark tests examine the drive's behaviour when copying a few big files, a lot of small files and a mixture of file sizes by using cached copy functions of your OS as well as reading/writing data depending on the data's compressibility. Additionally, it performs the tests using 1 or 64 threads and it determines the SSD's access time. AS SSD Benchmark reads/writes a 1 GByte file as well as randomly chosen 4K blocks. ![]() Test the sequential or random read/write performance without using the cache.
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