Hybrid Disk Array Architecture and its Performance Analysis
Takashi OEDA, Naoto Matsunami, Yasunori Kaneda, Hiroshi Arakawa, 育哉 八木沢 · Journal of the Magnetics Society of Japan · 1997
We developed a higher performance and lower cost Disk Array ( RAID ) system. It is based on software RAID and uses hardware accelerator for parity generation and others. The RAID control software is implemented as a device driver of an operating system and it executes address translation, cache management and hardware control functions. To reduce write penalty of RAID-5, we proposed new data update method named Delayed Parity Generation and new data-parity placement method. A Prototype shows twice performance in typical Database environment comparing with conventional RAID-5.