Wikipedia
In computing, a hybrid drive (solid state hybrid drive – SSHD) is a logical or physical storage device that combines a faster storage medium such as solid-state drive (SSD) with a higher-capacity hard disk drive (HDD) The intent is adding some of the speed of SSDs to the cost-effective storage capacity of traditional HDDs The purpose of the SSD in a hybrid drive is to act as a cache for the data stored on the HDD, improving the overall performance by keeping copies of the most frequently used data on the faster SSD There are two main configurations for implementing hybrid drives: dual-drive hybrid systems and solid-state hybrid drives
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