Hybrid file system
Jinsun Suk, Jaechun No · 2009
As density doubles with the rapidly dropping price each year for the past seven years (currently 32 Gbits/chip), NAND flash memory has virtually replaced HDDs (hard disk drives) in battery-operated consumer devices such as cellular phones, PMPs, and PDAs. This trend has also enabled the introduction of so-called flash memory SSDs (solid state disks) that has an interface identical to that of HDDs but use NAND flash memory inside as storage media. The ordinary filesystems designed for HDDs are no longer suitable for SSDs because SSDs have many different features from HDDs.