RAID systems increase data storage reliability by employing one or more data integrity techniques such as parity or checksum. However, the current implementations of software RAID systems suffer both inflexibility and unrobustness. First, different software RAID levels require different RAID systems and the system written for one level cannot be reused for others. In addition, writing a new RAI...

This paper proposes a novel fault-tolerant disk subsystem named Zoned-RAID (Z-RAID). Z-RAID improves the performance of traditional RAID system by utilizing the zoning property of modern disks which provides multiple zones with different data transfer rates in a disk. This study proposes to optimize data transfer rate of RAID system by constraining placement of data blocks in multi-zone disks. ...

One distinct advantage of Redundant Array of Independent Disks (RAID) is fault tolerance. But the performance of a disk array in degraded mode is so poor that no one uses the RAID after failure. Continuous operation of RAID in degraded mode is very important in many real time applications, which can not be interrupted in providing continuous services. In this paper, we propose an efficient arch...

© Operating System Support for NVM+DRAM Hybrid Main Memory Jeffrey C. Mogul, Eduardo Argollo, Mehul Shah, Paolo Faraboschi

Redundant arrays of independent disks (RAID) provide an ecient stable storage system for parallel access and fault tolerance. The most common fault tolerant RAID architecture is RAID-1 or RAID-5. The disadvantage of RAID-1 lies in excessive redundancy, while the write performance of RAID-5 is only 1/4 of that of RAID-0. In this paper, we propose a high performance and highly reliable disk arra...

Recent studies show that disk-based I/O subsystems account for a non-trivial portion of energy consumption in data-intensive environment such as storage servers and data centers. Previous powerefficient I/O solutions for a single disk drive or mobile computers cannot be applied to data-intensive environment where the I/O load is much more intensive. Current solutions seek help from multi-speed ...

As disk volume grows rapidly with terabyte disk becoming a norm, RAID reconstruction process in case of a failure takes prohibitively long time. This paper presents a new RAID architecture, S2-RAID, allowing the disk array to reconstruct very quickly in case of a disk failure. The idea is to form skewed sub-arrays in the RAID structure so that reconstruction can be done in parallel dramatically...