Solid State Drives SSD (Solid State Drive) is a breakthrough development of computer storage, brings more advantages such as better shock-resistant, quieter operation, more efficient and especially speed Higher production, thereby significantly increasing the overall performance of the system.
SSD has become more popular, from a product which is only for believers technologies have become popular, thanks improvements in cost, size and capacity for both PC and laptop. SSD initially called Serial ATA, also known as SATA.
First appearance in 2003 and gradually speed SSD is enhanced from 150MB / s to 600MB / s and up to 1GB / s lets you access Ultra-fast computer access and improve overall responsiveness of the system.
Drive SSD is kind of hard drive is composed of multiple memory "Non-volatile" (memory does not change), the drive will write and data stored in the flash chip, so that the data access is taking place almost immediately whether the drive can become fragmented over time to more reasonable use.
In addition, the SSD will help computer you faster response: boot, faster application load and shutdown faster. In addition to start / stop (start / shut down) OS faster access to your installed applications, open programs Word, Excel, Visual Studio, SQL, Photoshop ... much faster.
There are two types of memory chips most used in the manufacture SSDs: NAND SLC (Single-Level Cell) - Drive Me a level commonly used business because the price is higher ($ 3 / GB) and NAND MLC (Multi-Level Cell) - a multi-level memory drive that users normally use (~ 1 USD / GB).
In particular, the SLC chips store only 1 bit / transistor (0 or 1) also contains 2-bit MLC chip / transistor ( 00, 01, 10 and 11). Therefore, the amount of data stored by multiple MLC chip SLC chip is more than double the average reading speed but slower than twice (2x) and write speeds will be slower than three times (3x) on a NAND memory cell .
In terms of technology, totally different SSD HDD, instead composed of disks containing data plates stacked vertical axis as the HDD, SSD is made from the flash chip, so on the SSD has no concept fragmented drives, flash memory is considered a "candidate" to replace heavy traditional HDD to speed read / write and enter production throughput (IOPS) formidable.
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