Solid-state storage
Solid-state storage (SSS) is
Generally, SSS is much faster, but is more expensive.[3][4][5]SSS
Overview
Historically, computer system
Over time, advancements in central processing unit (CPU) speed has driven innovation in secondary storage technology.[7] One such innovation, flash memory, is a non-volatile storage medium that can be electrically erased and reprogrammed.
Solid-state storage typically uses the NAND type of flash memory, which can be accessed in chunks smaller than the entire capacity of the device. The minimal chunk size (page) for a read operation is much smaller than the minimal chunk size (block) for a write/erase operation, resulting in an undesirable phenomenon called write amplification that limits the random write performance and write endurance of a flash-based storage device.
Some solid-state storage devices use (volatile) RAM and a battery that preserves the contents of the RAM without system power as long as the battery continues to provide power. Flash-based storage does not suffer the limitation of a battery, but RAM-backed storage is faster and does not experience write amplification.[3][8][9]
As a result of having no moving mechanical parts, solid-state storage has no data access
Compared to electromechanical, solid-state devices tend to cost more for the same capacity, and generally are not available in the larger capacities available for electromechanical.
Also, flash-based devices experience
Device types
A
Solid-state storage is also available as
In general, an SSD uses a relatively fast interface such as
See also
- Drum memory – a magnetic data storage device used as the main working memory in many early computers
- i-RAM – a DRAM-based solid-state storage device produced by Gigabyte, operating as a SATA hard disk drive
- Magnetic storage – the concept of storing data on a magnetised medium using different patterns of magnetisation
- RAM drive – a block of random-access memory that the operating system treats as if it were secondary storage
- Sequential access memory – a class of data storage devices that read stored data in a sequence
- Wear leveling – a technique for prolonging the service life of some kinds of erasable computer storage media, such as flash memory
References
- ^ "What is Solid-State Storage (SSS)?". techopedia.com. Retrieved July 11, 2015.
- ^ a b "Backing Storage: Optical and Solid State". jhigh.co.uk. August 30, 2011. Retrieved July 11, 2015.
- ^ a b Margaret Rouse; Brien Posey. "Solid-state storage definition". techtarget.com. Retrieved July 11, 2015.
- ^ a b c d Michael Singer (January 7, 2013). "Solid State Storage Is Taking Over The Datacenter – Slowly". readwrite.com. Retrieved July 11, 2015.
- ^ a b Jonathan Corbet (October 4, 2010). "Solid-state storage devices and the block layer". LWN.net. Retrieved July 11, 2015.
- ^ "Red Hat Enterprise Linux 3: Introduction to System Administration, Chapter 5. Managing Storage". Red Hat. November 2, 2013. Archived from the original on 2016-03-21. Retrieved July 11, 2015.
- ^ "Accelerating Financial Applications Using Solid State Storage" (PDF). LSI Corporation. November 2011. pp. 1–2. Retrieved July 11, 2015.
- ^ Chris Evans (November 2014). "Flash storage 101: How solid state storage works". computerweekly.com. Retrieved July 11, 2015.
- CiteSeerX 10.1.1.154.8668.
- ^ Joel Santo Domingo (February 17, 2015). "SSD vs. HDD: What's the Difference?". pcmag.com. Retrieved July 11, 2015.
- ^ "Solid-State Storage Devices". igcseict.info. April 25, 2015. Retrieved July 11, 2015.
- ^ Chris Hoffman (September 19, 2014). "eMMC vs. SSD: Not All Solid-State Storage is Equal". howtogeek.com. Retrieved July 11, 2015.
- ^ "PCIe SSD: What it is and how you can use it". computerweekly.com. June 2010. Retrieved July 11, 2015.
External links
- Solid-State Storage: Technology, Design and Applications, IBM, May 4, 2010, by Richard Freitas and Lawrence Chiu
- USB Flash Wear Leveling and Life Span FAQ, Corsair, June 2007, archived from the original on October 13, 2007