HDD Vs. SSD

Published by warepin, on May 18th, 2011, in the categories: Hardware-related


When it comes to portable storage space, users have two options - HDDs (hard disk drive) and SSDs (solid state drive). But what are the differences between the two and especially, their benefits?


Resistance to accidents
An HDD (hard disk drive) is electronic-mechanical data storage: the storage is done on a magnetic surface disposed on round, rigid, metal platters. Therefore, the first thing to note about HDD is that it has mechanical moving parts which can easily be damaged. From this point of view, however, SSDs are more advantageous. These storage solutions are based mainly on DRAM or flash memory and a microprocessor, therefore, have no moving parts - the storage and transfer of information is accomplished with the help of electric circuits consisting solely of tiny semiconductors.


Writing Speed
Here the advantage is held also by SSD’s. Because data can be accessed at random, because it is not necessary for the head of reading / writing to synchronize with a rotating turntable, SSDs have much lower access times, and because SSD’s have their own CPU, they get high rates of I / O (input / output). In short, are faster than the classical HDDs in terms of writing and reading data. Moreover, the average access time for a SSD is 35-100 microseconds, while the average access time for a HDD is 5000-10000 microseconds; therefore SSDs are approximately 100 times faster than HDD’s.

Power consumption
The third advantage of the SSD (flash SSD) is that it consumes less power than a HDD and is also emitting less heat.

The lifetime
The same SSDs are better at this chapter. The problem with HDDs is that they are made ??of moving parts, and, after long periods of use, the physical damages occur, as with any mechanical machines. On the other hand, flash SSDs have an average lifespan of 300,000 cycles of writing, while the best get even 1.000.0000 writing cycles per cell

Noise levels
>Since the HDDs consist of mechanical parts, are characterized by different specific sounds, so SSDs are quieter.

Price
SSDs remain more expensive than HDDs, so from this point of view HDDs are advantageous - at the beginning of 2010, the hard drives had a price of 0.1 dollars per GB (the 3.5 inch variants) or 0.2 GB dollars (2.5 inches), while SSDs reaching $ 2 per GB.

Storage Capacity
Unfortunately, the storage capacity of SSDs is still relatively small compared with the HDDs. In 2010 the HDD Silicon Power 256GB, SATA 2 was the vaster SSD but also the most expensive. In classical HDD’s, Western Digital WD10TEVT, 1TB, 5400rpm, 8MB, SATA was the leader, having a price half lower than that of an SSD.


Conclusion
Following all the above points, it is easy to see that the SSD memory would be the ideal solution for a laptop or netbook, because it offers many advantages compared to HDDs, especially in terms of data protection. However, they have two important drawbacks: they are more expensive and come in smaller storage capacities. But taking into account the inestimable value of data is recommended that you buy a SSD, at least as a back-up system to the really important information.

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