Waves, Algebraic Growth, and Clumping in Sedimenting Disk Arrays

IDA - based Disk Arrays

Parallel disks can improve I/O performance in a manner analogous to the use of parallel processors to improve computation times. However, due to their data storage function, reliability issues become very important for these parallel disk systems. Currently proposed schemes use shadowing or parity to achieve reliability in parallel disks. In this paper we introduce the idea of using the Informa...

Multilevel RAID Disk Arrays

Bricks or Storage Nodes SNs holding a dozen or more disks are cost-effective building blocks for ultrareliable storage. We describe the Multilevel RAID MRAID paradigm for protecting both SNs and their disks. Each SN is a k-disk-failure-tolerant kDFT array, while replication or -node failure tolerance NFTs paradigm is applied at the SN level. We provide the data layout for RAID5/5 and RAID6/5 MR...

Self-Repairing Disk Arrays

As the prices of magnetic storage continue to decrease, the cost of replacing failed disks becomes increasingly dominated by the cost of the service call itself. We propose to eliminate these calls by building disk arrays that contain enough spare disks to operate without any human intervention during their whole lifetime. To evaluate the feasibility of this approach, we have simulated the beha...

Self-adaptive Disk Arrays

We present a disk array organization that adapts itself to successive disk failures. When all disks are operational, all data are mirrored on two disks. Whenever a disk fails, the array reorganizes itself, by selecting a disk containing redundant data and replacing these data by their exclusive or (XOR) with the other copy of the data contained on the disk that failed. This will protect the arr...

Excitons in quantum disks and disk arrays