OceanStor Pacific 9150 is an archive model of high-density scale-out storage. Each 5 U chassis houses two storage nodes and up to 120 HDDs. It provides high-availability data access services for long-term archiving of mass data. It has the following features: • Up to 1.92 PB raw capacity per chassis; • Up to 22+2 EC redundancy ratio and 91.6% disk space utilization; • Dynamic EC for high reliability, tolerating a simultaneous failure of four nodes.