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Hp eva guide Technical white paper Best practices to easily con ?gure the EVA HP Enterprise Virtual Array P Table of contents Abstract Background Overview Best practices summary First best practices Best practices to reduce cost Mixed disk capacities in u

Technical white paper Best practices to easily con ?gure the EVA HP Enterprise Virtual Array P Table of contents Abstract Background Overview Best practices summary First best practices Best practices to reduce cost Mixed disk capacities in uence the cost of storage Number of disk groups in uences the cost of storage Number of disks in uences the cost of storage Thin provisioning in uences the cost of storage HP Dynamic Capacity Management in uences the cost of storage Dynamic LUN RAID Migration in uences cost Disk performance in uences the cost of storage Cross-RAID snapshots in uence the cost of storage and the perceived availability of storage SAS midline disks in uence the cost of storage Best practices to improve availability Backup processes to enhance recovery Disk group type in uences availability RAID level in uences availability Disk group organization in uences availability and capacity utilization VRAID in uences availability Replacing a failed disk in uences availability Protection level in uences availability Number of disk groups in uences availability Number of disks in disk groups in uences availability Capacity management and improved availability Fault monitoring to increase availability Integrity checking to increase availability Remote mirroring and availability HP P Continuous Access software and VRAID in uence availability System fault-tolerant clusters and availability CBest practices to enhance performance Number of disks in uences performance Number of disk groups in uences performance Traditional Fibre Channel disk performance in uences array performance VRAID level in uences performance VRAID in uences performance Mixing disk performance in uences array performance Mixing disk capacities in uences performance and capacity utilization Read cache management in uences performance Controller balancing in uences array performance LUN count in uences performance Transfer size in uences sequential performance Snapshots and clones in uence performance HP P Continuous Access software and snapshots in uence performance Miscellaneous management best practices Increasing capacity of the array Disk groups and data security Best practice folklore urban legends myths and old best practices Urban legend Pre- ?lling new LUNs improves performance Most misunderstood best practice Summary Glossary For more information CAbstract An important value of the HP Enterprise Virtual Array EVA P is simpli ?ed management A storage system that is simple to administer saves management time and money and reduces con ?guration errors You can further reduce errors and unnecessary expenses by implementing a few best practices and optimizing your EVA P for their intended applications This paper highlights common con ?guration rules and tradeo ?s for optimizing the new HP EVA P and P for cost availability and performance Getting the most from your enterprise-class storage has never been easier Background Two design objectives for the HP EVA P are to provide excellent real-world performance and to reduce storage management costs These objectives result in the designing of an intelligent controller that reduces the number of tuning parameters that are user controlled In contrast traditional disk arrays typically have many tunable settings for both individual logical unit numbers LUNs and the controller Although