Storage Networking , Part 1 eBook: A storage network is any network that's designed to transport block-level storage protocols. But understanding the ins and outs of networked storage takes you deep into several of protocols. This guide covers SANs, Fibre Channels, Disk Arrays, Fabric, and IP Storage.
»Storage Networking 2, Configuration and Planning eBook: Picking up where Part 1 left off, Part 2 of our look at storage networking examines configurations for SAN-attached servers and disk arrays, and also includes a look at the future of IP storage.
»Storage Management Costs in the Enterprise: A Comparison of Mid-Range Array Solutions Whitepaper:
Many factors contribute to the ownership cost for enterprise storage. These include (but are not limited to): physical capacity relative to physical space requirements, performance capacity for data transfer and system reaction time, software maintenance and updates, expandability and flexibility, and much more.
»Storage Is Changing Fast Be Ready or Be Left Behind PDF: The storage landscape is headed for dramatic change, thanks to new technologies like Fibre Channel over Ethernet (FCoE), pNFS, object-based storage and SAS that will affect everything from NAS and SANs to disk drives. Get the knowledge you need to make the most of your storage environment, now and in the future.
»HP StorageWorks EVA4400 Demo:
Dont settle for an expensive and complex array that lacks functionality. The HP StorageWorks EVA4400 delivers virtual storage with enterprise class functionality at an affordable price.
»
Preparing for a Disaster
July 8, 2004 By Henry Newman
Preparing for a disaster is more often than not part of the storage planning process, and without question, it is one of the most difficult tasks, since it includes local hardware and software, networking equipment, and a test plan to ensure that you can recover from the disaster.
There are four questions you should ask to determine your disaster recovery requirements. They are:
How soon after a disaster do I need to be back up?
How much data has to move back and forth daily?
How far away is the disaster recovery site?
What am I doing with my data now (HSM/backup)?
The answers will help determine your technology choices and price. You also need to look at your current host-based systems, software, and RAID hardware. Disaster recovery is not cheap: you need hardware, software, and trained personnel to manage the systems and process.
Replication of data is the biggest issue. You have two types of data (disk-based and HSM-based tape issues), and each has its own complications. In this article, we will cover disk-based disaster recovery, and next time review the issues surrounding replication of HSM data over long distances.
Anyone trying to develop a disaster recover facility must replicate data. Up until the last ten years or so, data replication was often done with sneaker net (for those of you not old enough to remember, that's running the data to the other site, usually on tape). Since that time, networks have gotten faster and cheaper, and software has been developed to take advantage of these networks, both on the RAID and host side.
Data replication has two major components. The first is the method of replicating the data at the other site, usually either host-based replication or storage-based mirroring technology. The other issue is how to transport the data to the other site, either via WAN and IP or dark fiber and a Fibre Channel connection.
The technologies and products associated with each should be carefully considered, since changing disaster recovery plans and methods is not easy and certainly not cheap.
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