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EMC CLARiiON manual Independent disks

Models: CLARiiON

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Glossary

non-RAID group A storage system with SPs running a revision of FLARE software that storage system does not support RAID groups.

P

path See primary storage-system route.

primary In a storage system that has two SPs, each SP connects to each LUN storage-system route through a route indicated by the device name. The primary route

or primary route belongs to the SP that owns the LUN, and the secondary route belongs to the other SP. The SP on which a LUN is bound is the default owner of the unit. Knowing the routes is important because you may need to transfer control to the secondary route in the event of SP or Fibre Channel adapter failure.

R

RAID A technology with its own set of definitions. See RAID 0, RAID 1, (redundant array of RAID 1/0, RAID 3, and RAID 5.

independent disks)

RAID 0 Three or more disk modules bound as striped disks (the storage system reads and writes file information with more than one disk at a time). RAID 0 offers enhanced performance via simultaneous I/O to different modules, but does not intrinsically offer high availability. For high availability, you can software mirror the striped disks.

RAID 1/0 Four, six, eight, ten, twelve, fourteen, or sixteen disk modules bound as mirrored RAID 0 group. These disk modules make up two mirror images of two, three, four, or five modules each. A RAID 1/0 group combines the speed advantage of RAID 0 with the redundancy advantage of mirroring.

RAID 1 Two bound disk modules that the storage-system hardware will mirror.

RAID 3 Five modules that use disk striping (as with RAID 5). The hardware maintains parity information that lets the group continue to run and be rebuilt after a disk-module failure. With RAID 3, I/O occurs in smaller blocks than with RAID 5, and parity information is stored on one module, not distributed among all of them. RAID 3 works well for single-task applications that use I/Os of one or more 2-Kbyte

EMC CLARiiON Server Support Products for Windows Installation Guide

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EMC CLARiiON manual Independent disks
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CLARiiON specifications

EMC CLARiiON is a storied name in the realm of data storage solutions, renowned for its reliability, scalability, and advanced features. As a part of EMC's pioneering approach to enterprise storage, CLARiiON systems are designed to meet the demands of businesses ranging from small enterprises to large data centers.

One of the standout features of EMC CLARiiON is its support for both Fibre Channel and iSCSI protocols, which allows for versatile deployment options in various network environments. This dual-protocol capability is key in enabling organizations to leverage existing network infrastructures while providing the flexibility to scale as needed.

The architecture of CLARiiON is built on a modular design, featuring a series of storage processors, also known as storage controllers. This design not only enhances performance but also allows for easy upgrades and expansions. The use of RAID (Redundant Array of Independent Disks) technology ensures data redundancy and integrity, offering a variety of RAID levels to cater to specific performance and data protection needs.

EMC CLARiiON also integrates advanced data management features such as online capacity expansion, which enables administrators to add drives without disrupting operations. This is complemented by the system's support for thin provisioning, which allows for more efficient use of storage space, presenting only the amount of storage that is actually being used.

One notable technology employed by CLARiiON is the Storage Resource Management (SRM) suite, which provides powerful tools for monitoring, reporting, and managing storage usage and performance. This suite enables IT teams to optimize their storage investments by identifying trends and potential issues before they affect service levels.

Another critical aspect is the inclusion of automatic load balancing features, which help distribute workloads evenly across available storage resources. This promotes optimal performance and reduces the risk of bottlenecks during peak usage times. Additionally, the snapshot technology embedded in CLARiiON offers users the ability to create point-in-time copies of data, facilitating rapid recovery in the event of data loss or corruption.

Lastly, EMC CLARiiON systems are designed with high availability in mind. They often feature redundant components and advanced failover capabilities to ensure seamless operations. With these characteristics, EMC CLARiiON stands as a robust solution for organizations seeking to enhance their data storage strategy, driven by cutting-edge technology and tailored to meet diverse business requirements.