Solid State Drives(SSDs) are auxiliary storage devices like Hard Disc Drives (HDDs). They are non volatile, i.e. they retain the data even after the device powers down.
SSDs use micro memory chips for storage, which is completely different from the technology used by HDDs and other magnetic storage media, which have a moveable head. The moveable head incurs seek time, which is eliminated in SSDs.
Solid State Drives are tremendously faster, up to the tune of 20x â€“ 25x, when compared to the conventional Hard Disc Drives.
Factors affecting performance:
Two factors that affect the overall performance of the device.
In HDDs, the time taken by the read/write head to position itself to the sector (segments in a track) containing the information is defined as Latency.
The time taken to send the request for the information and receive a response.
SSD vs HDD:
Comparing SSD vs. HDD, we can say that the access time and latency of SSDs, ascribed to the lack of a moving head, are much lower than those of HDDs, thus giving it a performance advantage.
HDDs tend to slow down due to fragmentation. This is not the case with SSDs, which are not affected by fragmentation.
Hard discs have movable head, which moves at high speeds. This creates a lot of heat and noise in the disc. This also consumes lot of electricity.
The lack of moving head in SSD renders it calm. Also, it consumes a lot less power.
HDDs are vulnerable to head crash, which occurs when the moving head comes in contact with the platter. This may result in the damage of the device and hence results in data loss.
SSDs, on the other hand, are durable.
SSDs were a lot expensive when they first rolled in. Then on, the prices have gone down considerably . Even after the decrease in their rates, SSDs are still costly.
Though you may get them for the same price, the effective price of the device i.e. cost per 1 GB of storage in case of SSDs is much higher than the in case of HDDs.
SSDs are fast, that is a given. But, not everyone would be able to afford it. HDDs are cheaper, but slower.
Wouldnâ€™t it be good if the performance of SSDs could be achieved at the price of HDDs? Well, there is a way for that.
Multiple HDDs can be used in arrays as RAID or Redundant Array of Inexpensive Discs. They are used in large data storage, where reliability and performance are required. This can be replicated to fit our domestic requirements.
By having a combination of SSDs and HDDs, you can save money while having faster accessible speeds.
This method has other advantages too. By using SSDs for Operating System and other installing files and HDDs to store your media files, you could get the performance and in case of a damage to one of the devices, the data in the other device is still intact. As SDDs are more durable and less susceptible to damage, you wouldnâ€™t need to worry about your important data.