RAID

This paper provides the conceptual framework for understanding FAStT in a Storage Area Network and includes recommendations, hints, and tips for the physical installation, cabling, and zoning. IBM TotalStorage Fibre Array Storage Technology (FAStT) Storage Server is a redundant arrays of independent disks (RAID) storage subsystem that contains the Fibre Channel (FC) interfaces to connect both the host systems and the disk drive enclosures. tech news

This paper discusses the capabilities of the newest IBM pSeries 690 processor and its I/O subsystem. It also reviews the JFS2 (Enhanced Journaled File System) with Direct I/O implementation and provide details about our disk subsystem and disk adapters selections. This paper also provides guidance on selecting the proper RAID configuration, and gives other performance and tuning tips. tech news

To date, RAID technology, with its single parity, offered protection from a single failed disk with the caveat that no other disk fail or, increasingly more likely as disk media grow larger, an uncorrectable bit error not occur during a read operation while reconstruction of data lost on the failed disk was still in progress. If either secondary event occurs during reconstruction, then some or all data contained in the RAID array or volume could be lost. This paper provides an overview of RAID-DP and how it dramatically increases data fault tolerance from various disk failure scenarios. tech news

Symmetrix DMX defines high-end storage by delivering new levels of performance, availability, functionality, and economics. It provides the foundation to implementing Information Lifecycle Management by providing flexibility and choice in meeting different service level requirements with a single, integrated storage infrastructure. This paper describes the implementation of native RAID 5 on Symmetrix DMX systems with Enginuity 5670+. tech news

This paper discusses performance considerations of selecting RAID 5 or RAID 10 storage on an IBM TotalStorage Enterprise Storage Server Model 800 when using Oracle 9i Database. The paper also includes results of laboratory measurements of performance using both RAID levels for a variety of SQL queries. There are many factors that influence selection of RAID 5 or RAID 10, including overall cost and customer preference. The performance results suggest that both are viable options for most workloads. tech news