Recently, the exclusive-or computation capability was added on high performance disks to provide an alternative way of implementing RAID (Redundant Arrays of Independent Disks). This alternative approach reduces the traffic on the storage channel and eliminates the XOR computation load on the host or RAID controllers. Therefore, it may be a better approach than the traditional RAID design to im...

RAID systems are fundamental components of modern storage infrastructures. It is therefore important to model their performance effectively. This paper describes a simulation model which predicts the cumulative distribution function of I/O request response time in a RAID 0 system consisting of homogeneous zoned disk drives. The model is constructed in a bottom-up manner, starting by abstracting...

Plant-based diets contain a plethora of secondary metabolites that may impact on health and disease prevention. Much attention has been focused on the potential bioactivity and nutritional relevance of several classes of phytochemicals such as flavonoids, carotenoids, phytooestrogens and glucosinolates. Less attention has been paid to simple phenolic acids that are widely found in fruit, vegeta...

As disk manufacturers compete to build ever larger and cheaper disks, the possibility of RAID failures becomes more significant for larger and larger disk arrays, creating opportunities for products beyond RAID 6. In this paper, we present the design and implementation of RAIDq, a software-friendly, multiple-parity RAID. RAIDq uses a linear code with efficient encoding and decoding algorithms a...

Redundant Arrays of Independent Controllers (RAIC) is a new methodology for increasing the availability and performance of storage resources in on-demand enterprise data centers. Currently, large and dynamically-growing data sets, typical in e-business ondemand workloads, are constrained by the capacity, availability and performance boundaries of individual RAID controllers. Simple approaches t...

User I/O intensity can significantly impact the performance of on-line RAID reconstruction due to contention for the shared disk bandwidth. Based on this observation, this paper proposes a novel scheme, called WorkOut (I/O Workload Outsourcing), to significantly boost RAID reconstruction performance. WorkOut effectively outsources all write requests and popular read requests originally targeted...

Along with the information high-speed development, RAID, which has large capacity, high availability, and high performance, has played an important role in storage system. Comparison with SCSI disk drive, the body of EIDE disk drive is similar to SCSI’s, but for long time, EIDE disk drive performance is lower than SCSI disk drive’s. Recently,an EIDE drive is rapidly developed. New EIDE drive al...

Failure of disks in RAID is a bottleneck in processing. Data replication of RAID array systems is proposed in this paper for data validity. For a k-times replicated data in a RAID system with n disk arrays, the scheme takes the mean time between failures of the disks in a RAID system, allocates the data of the k-replicas in the n-RAID arrays based on the remaining time to the next failure and t...

Present day applications that require reliable data storage use one of five commonly available RAID levels to protect against data loss due to media or disk failures. With a marked rise in the quantity of stored data and no commensurate improvement in disk reliability, a greater variety is becoming necessary to contain costs. Adding new RAID codes to an implementation becomes cost prohibitive s...