![]() Power Loss ProtectionĮnterprise-class SSDs rely on power failure circuitry to monitor voltage changes as a form of power loss protection. Mechanical disks are not particularly robust and can fail at any time, as one manufacturer’s representative once stated, “Any time between 15 seconds and 10 years.” While SSDs haven’t quite reached the adoption level of mechanical drives, manufacturers estimate very low failure rates compared to standard technology. ![]() Failure RateĪny mechanical or electrical device can, and will, fail but the failure rate is much higher when the parts are in motion. SSDs can withstand up to 1,500 g during operation or 25 times that of a standard drive. SSDs, again having no moving parts, aren’t affected by mobility and are well-suited to such physical abuse. Such forces don’t often act on standard concrete and steel data centers, but what about mobile ones – mobile data centers such as those used by ground military forces, aboard ships, on aircraft or at trade shows? Movement can have devastating effects on mechanical drives, especially during write events. SSDs are a good choice for mobile systems due to their shock resistance from drops, bumps and g-forces. These are the most expensive option but offer the biggest benefits. These SSDs are mounted directly on the motherboard which frees up a sizable amount of space for other components or simply more storage. The smallest and by far best performing SSDs have a form factor known as M.2 that uses the NVMe interface. The next size down uses mini-SATA (mSATA) connectors which can also be installed in a PCY Express expansion slot. With rack space at a premium, that’s a very good thing. Because data on SSDs is stored on interconnected integrated circuit chips rather than mechanical disks, reducing their size can be taken a few steps further. Some are made to act as a replacement for HDDs, which come in sizes of from 1.8″ to 5.25″, and use the same SATA connector. SSDs come in a variety of form factors, offering far more flexibility when designing a system. On the other hand, even a higher-end HDD may only reach a speed of 160 MBps. New NVMe SSDs even have the ability to reach speeds of 3,000 MBps or more. But to get a baseline for an SSD vs HDD speed comparison, a standard SSD can read sequential data at around 550 megabytes per second (MBps) and write data at 520 MBps. Depending on the form factor, read/write performance between SSDs can vary. Since SSDs have no moving parts, their read and write speeds are impressive compared to their mechanical counterparts. Expect your SSDs to last two to three times longer than mechanical drives. Alternatively, SSDs have life expectancies reaching into decades, although trusting the 1 million to 2 million hour SSD expectancy claims seems as ridiculous as the 500,000-hour claims of mechanical drive manufacturers. At five years, you’re skating on ice so thin it’s really just very cold water. At three years, you should seriously consider a refresh. Many fail long before the lower end of the average, and few last beyond the upper end. Mechanical drives have an average lifespan of three to five years. Here are 10 reasons you should choose SSDs over HDDs. But they’re well worth the price when you consider the advantages. Why? Not because they’re cheap – they’re not. Built without moving parts, the advantages of SSDs have made them a popular choice for server vendors, SAN vendors and appliance manufacturers. So what if disks didn’t spin and could create rewritable storage without the need for platters, spindles or heads? This is where the cracks in the ceiling of SSD vs HDD are exposed. ![]() SSDs may be expensive, but they are well worth the price when you consider their advantages. Due to the mechanical build of HDDs, the possibility of hardware issues and limitations on performance are inevitable. If you’ve ever experienced a head crash, stiction, or painfully slow read/write speeds, then you know first hand the frustrations that accompany hard disk drives (HDDs). The SSD vs HDD debate continues to rage on even though the advantages of solid state drives (SSDs) are becoming more apparent.
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