As SSD capacities rise and prices drop, many see these as faster, smarter and slicker alternatives to HDDs. It’s a reasonable assumption to make; but misguided.
True, HDD shipments are falling, but this is due to a drop in demand in consumer markets as buyers’ preferences shift from desktop PCs to smart devices.
When it comes to the world of enterprise applications, HDDs have as much a claim to the storage crown as the young contender.
Technological advances are boosting the performance and capacity of HDDs. For example, helium-filled platters allow for a greater number of disks per housing (and so a greater capacity) and heat-assisted magnetic recording, which will use a laser to heat a section of a disk before it is written to, will also increase capacity when it becomes commercially available. These all help ensure that, cost per gigabyte, HDDs remain cheaper than SSDs.
Which option to choose really comes down to what the drive is being used for, such as how many write cycles will be required (for which HDD is superior) or how important is instant retrieval (SSD is best). Other factors that influence the choice include the need for self-encryption and how many drives there will be (and the associated rotational vibrations).
Published Date: 11/01/2017
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