This paper describes the structure ofPersonal Optical Disk Library (PODL), a kind oflarge capacity (40GB) optical storage equipment for personal usage. With the knowledge engineering technology integrated in the PODL, it can be used on knowledge query, knowledge discovery, Computer-Aided Instruction (CAl) and Online Analysis Process (OLAP).

This paper presents a new architecture for high-speed sustained data recording system, in which real-time and high throughput arc two key points. The FPGA implementation of the system controller is given as well. After the I/O bottleneck of conventional storage system structure is analyzed in this paper, a new recording and storage system framework is put forward by aiming to shorten the data transfer path and consequently to reduce the system resource utilization and data transfer latency, contrarily resulting in the improvement of the sustained data recording speed. To satisfy the real-time requirement, a local bus central logic controller module is designed to take the role of former host-side software and to reduce the utilization of host resource and latency caused by the intervention of the host. A speed-matching logic module between the disk in burst transfer mode and the sustained source acquisition data stream is also designed and implemented on a single FPGA chip. The proposed architecture and implementation approaches can be adapted in many applications where real-time and high I/O throughput are required.

The conventional data recorder is based on the tape for physics experiments. A modular disk recorder is developed that consists of data-splitting modules (DSM), data-recording modules (DRM) and commodity disk drives. This innovative disk recorder has a better performance and higher reliability than the tape recorder. It can be configured flexibly as different redundant array of inexpensive disks (RAID) structures to record acquired data according to different applications.

Most sustained data recording systems in many real-time fields are based on tape equipments. We have developed an innovative sustained data recording system based on disk array which consists of Array Controller Module (ACM), String Controller Module (SCM) and Main Controller Module (MCM). This system has a better performance and higher reliability than the traditional tape recorder and can be used conveniently in many areas of data recording, storing, playback, and remote backup. This novel recording system has been used in radar data recorder for spacecraft orbit tracking and satellite remote sensing data recording successfully.

In many real-time fields the sustained high-speed data recording system is required. This paper proposes a high-speed and sustained data recording system based on the complex-RAID 3+0. The system consists of Array Controller Module (ACM), String Controller Module (SCM) and Main Controller Module (MCM). ACM implemented by an FPGA chip is used to split the high-speed incoming data stream into several lower-speed streams and generate one parity code stream synchronously. It also can inversely recover the original data stream while reading. SCMs record lower-speed streams from the ACM into the SCSI disk drivers. In the SCM, the dual-page buffer technology is adopted to implement speed-matching function and satisfy the need of sustainable recording. MCM monitors the whole system, controls ACM and SCMs to realize the data stripping, reconstruction, and recovery functions. The method of how to determine the system scale is presented. At the end, two new ways Floating Parity Group (FPG) and full 2D-Parity Group (full 2D-PG) are proposed to improve the system reliability and compared with the Traditional Parity Group (TPG). This recording system can be used conveniently in many areas of data recording, storing, playback and remote backup with its high-reliability.