The idea that solid-state drives (SSD) would be used intensively in computer systems used to be highly disregarded. Now, laptops are beginning to utilize SSD disks for storage exclusively. Manufacturers are beginning to start a new revolution in electronic storage. While the cost is still expensive, things are changing rapidly with an increasing amount of competition.
Reliability, speed, price, and storage capacity are the primary aspects of a storage medium that ultimately determines their worth to the consumer. So how does SSD technology stack up in those regards?
Reliability
What good is a hard drive if it dies in a few months? Some hard drive makers don't know the answer to that question. A typical drive spins its platter at several thousand revolutions-per-minute, and this generates a significant amount of dispersed heat. Throw in the other movable parts that have a significant amount of work to do, and now it is easy to understand why many hard disk drives are so unreliable.
As things are looking for the future right now, SSD technology will be much more reliable than hard disks. When an SSD drive reads data, it puts virtually no strain on the drive at all. While writing to the drive is what will put wear on the drive, the typical consumer reads data from a drive significantly more times than writing to it.
(Image Credit: SanDisk)
A single block of memory on a solid-state disk does have a certain amount of cycles it can go through being written to before it fails, but solid-state technology allows methods of distributing the amount of writing done to individual blocks evenly which provides the maximum life expectancy from that drive. Imagine an indestructible axe cutting into a tree (data being written to the drive). The best way to cause damage is to hit the same spot repeatedly (a single memory block). However, if that axe was forced to take a swing at a different location every time (evenly dispersed writing), the tree (memory blocks and drive) will last a very long time.
Analogical writing aside, the reliability of an SSD drive is top notch. If you are beyond frustrated with failing hard disks, this is a great and superior alternative for data storage devices.
Speed
Speed is also an important factor when considering a storage device. The question is simple, which technology is faster? SSD drives are faster because they do not have to deal with the platter spin-up, seek, and read times, but some might be shocked to hear that SSD technology will allow well over 100 times faster performance due to the nearly instant seek time.
Faster boot, shutdown, and applications are just a portion of what these drives will provide. In many ways, the current bottlenecks of computers are storage devices, but things are changing fast.
(Comparing a typical 2.5" SSD vs HDD, clearly SSD wins | Image Credit: Samsung)
Price
With such a recent explosion of SSD popularity, the technology has not been given the opportunity to catch up to its platter-based equivalent in terms of the price to storage space ratio. As of January 13th, 2008, the price to storage ratio for a SUPER TALENT 2.5" 128GB SATA Internal SSD on Newegg.com at $3,219.99 is over $25 per gigabyte. By contrast, a Western Digital 3.5" 1TB SATA Internal HDD on Newegg.com at $254.99 is below $4 per gigabyte. Both of these being relatively new for average consumer distribution, it is easy to see that the difference in price is tremendous.
SSD drives are supposedly going to drop to around $2 per gigabyte by 2012 (stated by SimpleTech via Engadget), but by then we will likely have hard disk drives that will be able to pull off anywhere from 10TB to 100TB on a single platter. Hard disk drives win with regards to price, but it is only a question of how long.
Storage Capacity
Storage capacity with SSD drives will be on par with current hard disk technology. There are already announcements of terabyte drives being manufactured for military use. It might be quite awhile before the typical consumer to see a reasonably priced SSD drive that is offers a terabyte of storage, but the storage capacity is there. It simply depends on how much people are willing to pay for it.
Final Thoughts
All of the above considered, it forces an interesting situation on hard disk makers--with the growing competition of SSD technology, which new and competing companies are focusing their efforts on entirely, when will the time be right for switching the focus entirely on SSD technology arrive? That time might be now.
