![]() ![]() Now consider a Notepad text file that is 1KB in size and you want to save it. Also, the size of a block determines the data that can fit in it. Different operating systems have different sets of rules for allocating sizes. Then, touch on another conception “block size”. And, how many input/output operations happen in one second is called IOPS. Such data transactions are often referred to as input/output operations. When a data transaction occurs between the operating system and storage, it takes some time. It's really necessary to test their performance to make sure the drives work as advertised.Ĥ green buttons on the left are as follows.īefore I go into the details of the different tests listed above, let's first understand what size allocation is. Whenever you get a new device or upgrade your hard drive. And, if you want to perform each test manually, press the remaining green button after the previous test is over. So, if you click the All button, this tool will start executing all tests. ![]() In the center of the screen, there are two sections for read and write speeds. They are MB/s, GB/s, IOPS (input-output per second), and microseconds.
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