What Makes SSD Better Than NAND ?

Whether you’re using a USB flash drive or secure digital cards, you’re using flash memory. Flash memory, or NAND flash, has become a major part of every industry as we incorporate technology into anything and everything. One of the best attributes of NAND is that it does not require being powered on to actively store the memory; it continues to hold memory until manual deletion. This is an important feature because it makes NAND more cost-efficient than DRAM memory, which must be powered on to hold data.

There are two types of NAND flash memory, single level cell, and multi-level cell. The single-level cell, also known as SLC, is the better performing, yet pricier of the two. The SLC holds one bit per cell, while the multi-level cell, which is also known as the MLC, holds two bits per cell.

NAND cells do not last forever, and they were not intended to. The cells have a limited amount of cycles which it can be written over— and eventually, they burn out. To make sure your data is stored safely, it is important the wear is leveled out across all blocks, so the device does not wear unevenly and fail prematurely.

Solid state drives (SSD) are a better version of NAND memory. They play an important role to some industries where heavy loads of non-volatile memory may be necessary. SSDs are a replacement to hard disk drives, or standard disk drives. Because they have no moving parts, they don’t suffer from mechanical latencies and can be subjected to more shock and vibrations than a hard disk drive, making them great for portable use and mobile applications. The SSD is usually able to write 20 GB per day. They operate in hundreds of milliseconds which makes them far more efficient version than a hard drive.


February 22, 2017

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