Hard drives generally come in two physical designs: 3.5-inch (for desktops) and 2.5-inch (for laptops). The laptop hard drives can also come in different thicknesses, such as 9.5mm (standard), or 7mm (ultrathin). A hard drive is connected to a host using a connecting interface standard. Connection interface: This is the standard that determines how a hard drive (or a standard SSD) is connected to a host (such as a computer) and how fast the data rate is between the storage device and the host. There have been a handful of interface standards for storage. Currently, most if not all consumer-grade drives use the serial ATA (or SATA) standard. This standard is available in three generations: SATA I, SATA II, and SATA III, which offer a speed cap of 1.5Gbps, 3Gbps, and 6Gbps, respectively. The latest generation of the SATA standard is backward compatible with the previous generations, in terms of usability. In terms of performance, you'll need use those of the same SATA generation for optimal speed.
Pros of hard drives: Generally, hard drives offer the largest amount of storage per unit (currently up to 4TB for the 3.5-inch design, or 2TB for the 2.5-inch design), They are also very affordable, costing just a few cents per gigabyte, For this reason, hard drives are still the most popular form of computer storage and are used in most storage applications, Cons of hard drives: Since these are mechanical devices, hard drives suffer from wear and tear, just like any other machine with moving parts, They also use significantly more energy (compared with SSDs), generate heat, and are much slower, Hard drives also require some t mobile screen protectors iphone 8 plus time to spin from being idle or turned off, which makes the host computer take longer to boot, Generally, a typical hard drive, in common use, lasts about five years..
Unlike a hard drive, an SSD has no moving parts. Similar to system memory, SSDs are microchips designed to store information. However, these are nonvolatile memory chips that can retain information the way hard drives do. Most standard SSDs come in the 2.5-inch design, and on the outside, they look just like a regular 2.5-inch hard drive. Standard SSDs work in any cases in which hard drives of the same connection interface are used. Since there are no moving parts, SSDs can be made in many different (and sometimes proprietary) physical shapes and sizes, making them the best choice for mobile devices, such as smartphones or tablets. Generally the lifespan of an SSD depends on how much information is being written on it (the less, the better) and how large its capacity is (the larger, the better).
Pros of SSDs: Much faster than regular hard drives, much more energy-efficient, more durable, much cooler, and quieter, Upgrading a computer from using a hard drive to an SSD as its main storage offers the single biggest incentive in terms of performance, Most SSDs last much longer than five years; some could even last hundreds of years, Cons of SSDs: The biggest catch with SSDs is the price, Currently SSDs t mobile screen protectors iphone 8 plus are between 7 and 50 times more expensive than hard drives in terms of cost per gigabyte, depending on the capacity, SSDs also have limited capacities, offering just about 512GB or less before getting too expensive to be practical, SSDs also suffer from a finite time of writing, called "write endurance." In other words, an SSD can be written on a limited number of times before it becomes unreliable, Before you can rewrite on a part of the drive, you'll need to first erase the information already stored on that part, This is why the write endurance rating is also known as the program/erase (PE) cycles, In reality, this is not a big deal because for most situations, an SSD would likely be replaced for other reasons way before its PE cycles end..
Type of SSDs: There are three mains type of consumer-grade SSDs, differentiating by their design and connection type. The standard SSD, the most popular type of SSDs on the market, shares the same design and connection type as a standard laptop 2.5-inch hard drive. It uses the SATA connection type and has the speed cap of that of the SATA standard which is now at 6Gbps. The second type is mSATA SSD which is much smaller and use the mSATA connection type. mSATA is used only in ultra mobile devices and certain laptop. It also has the speed cap of the SATA standard.