While most major disk-drive manufacturers have developed or are already selling solid-state disk drives or hybrid drives, which use a combination of flash memory and spinning disk, Fujitsu Ltd. has chosen not to develop a product for market. Joel Hagberg, Fujitsu"s vice president of business development, said his company does not plan to launch any solid-state disk-drive products over the next two years because the value proposition of the technology is not compelling enough and won"t be until technology breakthroughs change solid-state disk"s performance and reliability.