![]() Achieving faster speeds is limited by the ability of platters to spin any faster than they currently do, but HDDs still have their purpose and advantages.Īn SSD isn’t limited by spinning platters, so you get over 7,000MB/second transfer speeds. The drive spins at 7,200 revolutions per minute (RPM), which is the fastest a physical object can spin. The fastest HDD to date is the Seagate Exos, which offers 524MB/second speeds. Because the head is constantly moving across platters, HDDs have a higher chance of damage from mechanical failure. HDDs must be safely packaged when shipped and can easily break from exposure to the elements or any abrupt movements. If damage is done to the head and it touches the platters, it corrupts stored data. To avoid damage from dust particles or any other small objects, HDDs are built in a dust-free clean room.Īn HDD is much more fragile than an SSD. The distance between the head and the platter is smaller than the size of a speck of dust. Data is stored magnetically, so a strong magnetic field could corrupt data. The head reads and writes data to the platters, which means that the speed of the platter determines the speed of data reads and writes. HDDs contain stacks of spinning platters with a head that moves up and down as the platter spins. They don’t have the risk of data damage from magnets, so using one around something with strong magnetic fields (e.g., telephony equipment) won’t have a noticeable effect. They’re also more resistant to damage if you move a computer around or bump it against something. HDDs use spinning platters, which makes them heavier and larger than SSDs.īecause SSDs are made of circuits, they can be as tiny as a stick of gum, making them convenient and portable. SSDs are smaller because they’re circuits not unlike the USB devices that you plug into your computer. The foundation of speed difference is based on the physical properties of devices and the general laws of physics. What’s the Difference Between SSD and HDD? HDD devices are slower, but they have a large storage capacity. ![]() SSD devices are faster, but they also cost more. ![]() Both types of storage are built and engineered differently, and they offer different benefits. Currently, you have two storage device options: a solid-state drive ( SSD) or a hard-disk drive (HDD).
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