The major advantage of an HDD is that it is capable of storing lots of data cheaply. This is especially a concern for devices such as laptops, notebooks, ultrabooks, 2-in-1 computers, etc. Since, the drive is magnetic in nature and works on the rapidly rotating disks which are read by a reading arm, even a mild fall can damage the disk leading to data loss. Typical laptop drives today spin at either 5400 RPM (Revolutions per Minute) or 7200RPM. The faster the platter spins, the faster an HDD can perform. A read/write head floats above the spinning platter reading and writing data. HDD uses magnetism to store data on a rotating platter. HDD were first introduced by IBM in 1956 - nearly 60 year old technology. HDD stands for Hard Disk Drives has been around relative to the technology world. eMMCs are commonly available in 16GB, 32GB, and 64 GB, and maximum in 128GB variant. The standard data transfer speed of HDD is 300 MB/s, while the top speed of eMMC is 400 MB/s. This is also the reason why eMMC are generally slightly faster in transferring data than HDD of the same capacity. This is also the reason that low end budget laptops and 2-in-1 computers prefers eMMC to pair with their budget CPUs. This puts less strain on the CPU, thus making the system faster.
What is hdd re: laptops free#
In eMMC, the integrated flash memory controller free up the CPU to handle other tasks. Whereas, HDD and SSD use SATA interface to connect to the CPU then the CPU is responsible for reading and writing to and from memory. This silicon die is then soldered directly to the motherboard, similar to a CPU of a computer. However, unlike HDD and SSD, eMMC also incorporates a flash memory controller in addition to the flash memory, both of which are integrated together on the same silicon die. Like SSD, eMMCs also uses integrated circuits, leading them to be not easily damaged by regular bumps and falls. They are also usually faster than HDDs, however that depends on the models. The technology is encased inside either a plastic or metal case and looks like nothing more than what a battery might:ĮMMC stands for Embedded MultiMediaCard which uses integrated circuits leading them to be not easily damaged by regular bumps and falls.
If you look at the images below, you’ll see the top and undersides of a typically-sized 2.5” SSD. An example of a fast controller today is the SATA 3.0 6GB/s SSD controller that supports burst speeds up to 550MB/s read and write speeds.įinally, you may be wondering what an SSD looks like and how easy it is to replace a hard drive with an after-market device. The controller is a very important factor in determining the speed of the SSD. In other words, the data storage life of an SSD can outlive you!Īn SSD does not have a mechanical arm to read and write data, it instead relies on an embedded processor called a controller to perform a bunch of operations related to reading and writing data. Regardless, that rumor is certainly not true with today’s technology, as you can read and write to an SSD all day long and the data storage integrity will be maintained for well over 200 years. During the early days of SSD, rumors floated around saying stored data would wear off and be lost after only a few years. This is of course an essential characteristic of any type of permanent memory. What does non-volatile mean you ask? The simple answer is that you can turn off the disk and it won’t “forget” what was stored on it. This difference is what makes SSD so much faster.Ī typical SSD uses what is called NAND-based flash memory. Conversely, a hard disk drive uses a mechanical arm with a read/write head to move around and read information from the right location on a storage platter. Like a memory stick, there are no moving parts to an SSD while information is stored in microchips. You’re probably familiar with USB memory sticks - SSD can be thought of as an oversized and more sophisticated version of the humble USB memory stick. Let me diffentiate below these three storage: Examples and most commonly use flash storage for laptop is SSD and eMMC while non-flash storage is HDD. You might ask, is it really important? Should I care about it by knowing the type of storage in my laptop? The answer is yes! So in this thread I will try to differentiate commonly use storage for laptop but this thread does not promote any brand or manufacturer of storage.īasically there are only two generic type of storage, flash storage and non-flash storage. Do you sometimes questions why does your laptop becomes very slow even with a powerful CPU and RAM? Have you recently encounter data loss just by accidental drop of your laptop? This thread might help you understand one important hardware of your laptop, this is the storage.
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