Should you buy that new storage system with SSD, HDD, or both? The answer depends on understanding the balance of cost, performance, capacity, and reliability between these two storage technologies. And the ultimate goal is most cases is to create aΒ combinationΒ of HDD and SDD for your workloads and budget.
SSDs are higher performing, but come at a premium cost. Not every workload needs that level of investment. Capacity comes into play as well, with SSDs capable of higher capacity than HDDs. But once again, higher cost makes buying SSD for capacity a very expensive proposition and a poor one for long-term storage. Finally, the differences in reliability are a little murkier but in general there are no glaring differences between the two types of media.
Performance Differences in SSD and HDD
The performance difference between SSD and HDD is very clear: SSD performance is its primary differentiator because HDD can only accelerate so far.
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http://www.enterprisestorageforum.com/storage-hardware/ssd-vs.-hdd-performance-and-reliability.html
Source: DRJ New feed
