Published in Memory

SanDisk to launch ExtremeFFS

by on06 November 2008


New file system for SSDs


SanDisk has announced that the company is working on a new type of file system for SSD drives which SanDisk has named ExtremeFFS (Flash File System). Although we can't but think the name is a little bit unfortunate, as FFS tends to have a very different meaning with a large group of people.

According to SanDisk, the new file system has "the potential to greatly extend endurance and accelerate SSD random write speeds by as much as 100 times" which almost sounds too good to be true. However, if you continue to read the press release, you soon realise that SanDisk has made some serious changes here.

First of all, ExtremeFFS uses a page-based algorithm with no fixed coupling between physical and logical location. This allows for data to be stored in a more efficient way than it is with current file systems. It also allows for simultaneous read and write operations from different memory cells. Lastly but not least, ExtremeFFS can learn usage patterns which allows for data that is used more often to be stored in quickly accessible locations.

On top of this, SanDisk has also introduced LDE (Long-term Data Endurance) and vRPM (virtual Revolutions Per Minute) which both are ways to test SSD drives. The first is a reliability measurement and the second is a performance comparison test against traditional hard drives.

You can find the press release with more details here

Last modified on 07 November 2008
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