http://www.howtogeek.com/195262/hybrid-hard-drives-explained-...
Om jag har förstått det rätt kommer en hybrid disk att "lära" sig vilka filer som används oftast och automatiskt lägga in dem på SSD-delen, så den kommer vara långsam i början men bli snabbare snart.
"A hybrid hard drive will be significantly faster than a mechanical drive. That caching algorithm will store operating system and program files in the solid-state memory, offering solid-state speeds when accessing cached files.
Hybrid drives start on the slow side. When you start using a hybrid drive, no caching will have occurred — so the drive will be just as slow as a traditional mechanical drive. As you use the drive and it learns which files should be cached, speed will gradually improve."