SSD (Solid State Drive)

“Solid State Drive” is simply called as SSD. The words that mesmerized the storage industry with its compatibility, file retrieval speed and its slim structure. It has no moving mechanical components like spinning disks, read / write heads etc. The SSD makes use of NAND based flash memory (Nothing but the same technology used in memory cards) which access data more efficiently without power.

Solid State Drives advances when compared with traditional disk based hard drives. SSD’s are less susceptible to physical shock, noiseless and lower access time and latency.

Past:

On searching for the origin for SSD’s it went back to the early 1950’s, 70’s and 80’s indulged in the development of supercomputers by IBM, AMDHAL and CRAY. At first they came as a replacement for DRAM (Dynamic Random Access Memory) to reduce cost.

Later in 1994 STEC Inc is the first one to introduce logic flash controller operation for commercial purpose. In 1995 M-Systems is the first one to build a flash based SSD. Since it was introduced as a replacement to DRAM and failed to DRAM in terms of speed. So the view turned from the primary memory to mass memory. And since that many companies indulge in techno war to provide the best of SSD.

Present:

The SSD’s currently make use of NAND Flash Non volatile Memory, controller, cache and super capacitor. So far the maximum size and speed of SSD has reached 10TB in volume and 1.3 million IOPS.

The NAND Flash Non volatile memory is nothing but the DRAM but slower than it and faster in access than the traditional hard drives.

Since the NAND based flash memories are very slower than DRAM, this issue is solved by the controllers. These controllers embed large integrated set of flash memories in a parallel structural design. Because of this the latency time is reduced and the number of IOPS is also increased.

The super capacitor is nothing but a battery which holds power and data to be integrated simultaneously. When power is dropped these capacitors pushes the data to be integrated.

The buffers hold data that are frequently accessed like SSD information etc. As well as other data that is requested to serve hot at times.

Future:

The future of SSD lies under the hood of nano and hybrid technologies. They have been named Solid State Hybrid Drives (SSHD). The main difference between SSD and SSHD is that the SSHD makes use of multiple caches to store lot of hot contents. And the goal is set in a way to recover files from SSD hard drive faster and smarter using adaptive technologies.

Advantages:

  • There are so many advantages to SSD than traditional HDD;like size, speed, reduced latency, seek time and turn around time
  • Well most of the credential plusses came to SSD due to the complete electronically tasked operations and less power consumption

Disadvantages:

Though the SSD is non comparable with traditional HDD they have delimiters too like.

  • On continual usage the performance of SSD degrades eventually
  • Even in SSD the speed differs too. SSD using single cell build are faster than multi cell build. But SSD using DRAM is the fastest of all
  • Since it uses full and full electronic stuffs, the confidential data and damage retrieval is more complex even for the most intellectual organization
  • The robustness varies among models
  • Sometimes fails to notify the user at the time of major slaughter