RAIDtasot

RAIDtasot is a theoretical data storage architecture that extends traditional RAID by distributing data in fixed-size tiles across a pool of disks or storage nodes and maintaining parity across the same tiles in a rotating, tile-aware topology. The approach aims to combine the redundancy of RAID with the parallelism and resilience of distributed storage, optimizing bandwidth and fault tolerance for modern multi-user workloads.

In RAIDtasot, data is divided into tiles and organized into stripes. A stripe contains a configurable number of data tiles and parity tiles. Parity can be calculated using conventional XOR or more advanced codes, and parity tiles are distributed across disks or nodes to avoid hot spots. The layout supports dynamic re-striping, allowing the system to rebalance tiles when disks are added, removed, or when recovery from failures occurs. This tiling concept enables concurrent reads from multiple tiles and distributes rebuild traffic, reducing the impact on active I/O.

Fault tolerance in RAIDtasot is determined by the number of parity tiles per stripe and the topology across nodes. The system can tolerate the loss of up to P tiles within a stripe (subject to the coding scheme) and can recover using the remaining data tiles and parity tiles. Recovery typically runs in the background to minimize performance degradation during rebuilds.

Common use cases include data centers requiring high throughput and scalable redundancy, network-attached storage, and workloads with mixed read/write patterns. Implementations require software support in storage controllers or operating systems and careful tuning of tile size, stripe width, and parity scheme to balance performance, capacity, and resilience.