RAID-based Storage Systems

A Tutorial on RAID Storage Systems

RAID storage systems have been in use since the early 1990’s. Recently, however, as the demand for huge amounts of on-line storage has increased, RAID has once again come into focus. This report reviews the history of RAID, as well as where and how RAID systems fit in the storage hierarchy of an Enterprize Computing System (EIS). We describe the known RAID configurations and the advantages and ...

The TPT-RAID Architecture for Box-Fault Tolerant Storage Systems

TPT-RAID is a multi-box RAID wherein each ECC group comprises at most one block from any given storage box, and can thus tolerate a box failure. It extends the idea of an out-of-band SAN controller into the RAID: data is sent directly between hosts and targets and among targets, and the RAID controller supervises ECC calculation by the targets. By preventing a communication bottleneck in the co...

Adapting RAID Methods for Use in Object Storage Systems

Object-based storage systems are currently being investigated as promising possibilities for future large-scale storage needs. The ’Ceph’ storage system [2] has been designed with the goal of scalable petabyte-level storage, but currently uses mirroring as its primary means of reliability. While the mirroring of objects has a certain elegance for simplicity of design and understanding, it is ex...

Ceph-based FUJITSU Storage ETERNUS CD10000: an improvement over traditional RAID-based storage systems in OpenStack cloud environments

Auto RAID hierarchical storage system

once the total number of disks gets large, it becomes more cost-effective to employ an array controller that uses some form of partial redundancy (such as parity) to protect the data it stores. Such RAIDs (for Redundant Arrays of Independent Disks) were first described in the early 1980s [Lawlor81, Park86], and popularized by the work of a group at UC Berkeley [Patterson88, Patterson89]. By sto...