Synchronized Disk Interleaving
IEEE Transactions on Computers
A case for redundant arrays of inexpensive disks (RAID)
SIGMOD '88 Proceedings of the 1988 ACM SIGMOD international conference on Management of data
Analysis of file I/O traces in commercial computing environments
SIGMETRICS '92/PERFORMANCE '92 Proceedings of the 1992 ACM SIGMETRICS joint international conference on Measurement and modeling of computer systems
The Performance of Parity Placements in Disk Arrays
IEEE Transactions on Computers
An analytic performance model of disk arrays
SIGMETRICS '93 Proceedings of the 1993 ACM SIGMETRICS conference on Measurement and modeling of computer systems
Scheduling algorithms for modern disk drives
SIGMETRICS '94 Proceedings of the 1994 ACM SIGMETRICS conference on Measurement and modeling of computer systems
Simulation Modeling and Analysis
Simulation Modeling and Analysis
VLDB '88 Proceedings of the 14th International Conference on Very Large Data Bases
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An approach for designing high performance disk array systems using a dual head disk structure is presented. In general, both I/O bandwidth and reliability can be significantly improved by using disk array systems, i.e., RAID. However, the performance of RAID systems can be significantly degraded where small read/write accesses are frequently requested. Thus, the dual head disk structure is applied to improve the performance of RAID systems. The dual head disk model can reduce not only the maximum seek time but also the average seek time by dividing the disk surface into two separated regions, one for each head. To compare the performance of the dual head RAID (DH-RAID) system with the conventional RAID systems, simulations are performed with two types of RAID configurations and several workloads. Simulation results show higher performance can be obtained by DH-RAID systems as compared with the conventional RAID systems. The DH-RAID model can provide better performance in the application environment that has a relatively high seek time ratio.