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October 12, at pm. October 10, at pm. It acts as a temporary memory space while the hard drive reads and writes data to the permanent storage on the platters.
Hard drives have built-in microcontrollers that govern and process data coming in and out, much like a CPU. You can also think of hard drive cache as something similar to buffering when it comes to streaming content. Everyone has dealt with streaming a video on a slow connection. The video player waits before or during playback to collect data so that it can continue playing the video more smoothly as it progresses.
Hard drive cache allows a hard drive to do the same thing when reading and writing data. As the hard drive reads and writes data, it pulls it from the platters. Very often, a hard drive is working with the same data repeatedly, since the person using the computer is usually working on one or two tasks at a time.
The hard disk drive HDD holds data in its cache that you or your programs are using most frequently and, most recently, eliminating the need to pull it from the platters each time that the data is needed. It also reads the data around it. Therefore, hard drives try to compensate by guessing.
When a user or a program requests data reminds me of Tron , the hard drive reads that data and the data around it from the platter and stores it all in the buffer. Since there is a decent likelihood that the surrounding data is similar, the drive assumes that the user or process will also request the surrounding data soon.
There are a bunch of different steps to retrieving data from a hard drive. Each one of them takes time, and they rarely sync up. Then, I will introduce what hard drive cache is and how it works. What is the hard drive cache? Hard disk cache is often called disk buffer. As the name suggests, its purpose becomes clearer. When reading and writing data to the persistent storage on the platter, it acts as temporary storage for the hard drive. You can regard the hard drive cache as being like RAM specifically for the hard drive.
The hard drive has a built-in micro controller that controls and processes the data going in and out of the drive, just like the CPU. The cache works with the controller to store the memory being processed. You can also regard it as a buffering video. Everyone has dealt with streaming a video on a slow connection. The video player waits to collect more data before or during playback to continue playing the video for smoother. When reading or writing data, the hard drive cache allows the hard drive to perform the same operation.
How does hard drive cache do?
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