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An SSD is a data storage device that uses flash memory instead of a spinning disk, allowing it to have no moving parts. It emulates a traditional hard disk drive to allow compatibility with existing software and interfaces. While SSDs have much faster read speeds than HDDs, their write speeds are slower. However, manufacturers are differentiating their SSD products to improve write performance. Long term, write speeds may decrease as flash memory technology scales down due to degradation in NAND performance from die shrinks and increased bits per cell.
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- 1. SSD Technology A Solid-State Disk (SSD) is a data storage device that emulates a hard disk drive (HDD) NAND Flash SSDs are essentially arrays of flash memory devices which include a controller that electrically and mechanically emulate, and are software compatible with magnetic HDDs
- 2. SSD vs. HDD Issues Q. SSD access times are great, but write speeds are a step back, so why would I want an SSD? A. Small reads (4k) are 20X faster than similar reads on an HDD. Q. SSD write performance still leaves much to be desired? A. This is where SSD manufacturers differentiate their product. Q. I heard that NAND performance is degrading as a result of die shrinks and increases in bits per cell. Wont this slow SSD performance gains? A. Correct. Write performance problems are not going away.