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Speeding up Solid-State Drives by ionela


									Speeding up Solid-State Drives

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Speeding up Solid-State Drives
By John Artiuch Created 09/19/2008 - 04:34

Technology Flash Memory Intel Memory Solid State Drives ssd SSD (Solid State Drives) is a hard drive based on flash memory. The main cause of low throughput in solid state drives is the fact that NAND flash memory (which makes up the drives) cannot override old data with new data but needs free memory space to store the new data. This means that if you want to update an existing block of data you need to save the old data to a new location, erase the old data, merge it with the new information and finally write it to its original location. This is not a huge problem when dealing with large files such as video clips however it becomes an issue when you need to frequently make changes and updates to small chunks of data. But by adding a small amount of ferroelectric RAM (FRAM) to the mix, researchers have found that they can improve the performance of a solid state drive by 20 percent. Unlike NAND memory, FRAM can overwrite existing data. By combining the two types of memory and exploiting their individual benefits, a high performance solid state drive can be created. The bulk of the storage is still done with NAND memory which is smaller and cheaper than FRAM. But things such as data maps and other information keeping track of the drive’s data is stored in FRAM. This is because small changes are frequently made to this type of information and this is something that FRAM is good at handling. Mtron Storage Technology, a Korean SSD maker, is working along side Seoul National University’s researchers to bring a product to market. Till than the best we have is Intel’s new drives which employ a totally new approach to the way the NAND memory communicates with a system. Using ten parallel channels which enable up to 32 concurrent operations Intel’s drives are a lot quicker than its competitors’. However, the drives are still on the expensive side at $8 per Gbyte comparing to 25 cents in a typical hard drive. For more information on Intel’s solid state drives visit the site. Trademarks

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21.09.2008 11:27

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