SRAM-based FPGAs have been widely used in space engineering. However, the configuration memory in SRAM-based FPGA is susceptible to the single event effects (SEE). It can disrupt the communication or control functions of the spacecraft. To mitigate SEE effects of the SRAM-based FPGAs used in space radiation environment, Beijing Microelectronics Technology Institute (BMTI) developed a 300 thousand gates Single Event Effect hardened SRAM-based FPGA -- BQVR300RH. The BQVR300RH employs Radiation Harden by Design (RHBD) technique. Hardened standard cell library based on Adaptive SRAM (ASRAM) structure is established. For especially sensitive and important resource, other assistant techniques are also adopted. The experiment results show that the BQVR300RH improved the anti-SEU characteristic a lot, compared with Xilinx 300 thousand gates space-grade SRAM-based FPGA (XQVR300). The SEU threshold of BQVR300RH is 19.06 MeV⋅cm2/mg. The anti-SEU characteristic improves three orders of magnitude than XQVR300. The improvement of anti-SEU behavior expands the usage of SRAM-based FPGA in aerospace applications. Currently, BQVR300RH has been used in space field in China.

The programmability of an FPGA poses a number of challenges when it comes to complete and comprehensive testing of the FPGA itself. A large number of configurations must be downloaded into the FPGA to test the programmable sources. A great many methods were proposed to reduce the number of configurations to minimize the test time, but few of papers were focus on reducing single configuration time. This paper proposes a novel method to reduce more than 30% of the total configuration time based on partial reconfiguration technology and sorting algorithm. This method is implemented on a series of SRAM-based FPGAs. The experimental result shows that this method reduces 30%-45% of the total configuration time and can be generally applied to all SRAM-based FPGAs currently.

Recent studies indicate that the energy cost and carbon footprint of data centers have become exorbitant. It is a demanding and challenging task to reduce energy consumption in large-scale storage systems in modern data centers. Most energy conservation techniques inevitably have adverse impacts on parallel disk systems. To address the reliability issues of energy-efficient parallel disks, we propose a reliable energy-efficient RAID system called REED, which aims at improving both energy efficiency and reliability of RAID systems by seamlessly integrating HDDs and SSDs. At the heart of REED is a high-performance cache mechanism powered by SSDs, which are serving popular data. Under light workload conditions, REED spins down HDDs into the low-power mode, thereby offering energy conservation. Importantly, during an I/O access turbulence (i.e., I/O load is dynamically and frequently changing), REED is conducive to reducing the number of disk power-state transitions by keeping HDDs in the low-power mode while serving requests with SSDs. We build a model to quantitatively show that REED is capable of improving the reliability of energy-efficient RAIDs. We implement the REED prototype in a real-world RAID-0 system. Our experimental results demonstrate that REED improves the energy-efficiency of conventional RAID-0 by up to 73% while maintaining good reliability.