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“Procedures for replacing or adding nodes to an existing cluster”
Scope and Objectives
The scope of this document is two fold. The first section provides a procedure for replacing existing nodes in a SVC cluster non-disruptively. For example, the current cluster consists of two 2145-8F4 nodes and the desire is to replace them with two 2145-CF8 nodes maintaining the cluster size at two nodes. The second section provides a procedure to add nodes to an existing cluster to expand the cluster to support additional workload. For example, the current cluster consists of two 2145-8G4 nodes and the desire is to grow it to a four node cluster by adding two 2145-CF8 nodes.
The objective of this document is to provide greater detail on the steps required to perform the above procedures then is currently available in the SVC Software Installation and Configuration Guide, SC23-6628, located at www.ibm.com/storage/support/2145. In addition, it provides important information to assist the person performing the procedures to avoid problems while following the various steps.
Section 1: Procedure to replace existing SVC nodes non-disruptively
You can replace SAN Volume Controller 2145-8F2, 2145-8F4, 2145-8G4, and 2145-8A4 nodes with SAN Volume Controller 2145-CF8 nodes in an existing, active cluster without taking an outage on the SVC or on your host applications. In fact you can use this procedure to replace any model node with a different model node as long as the SVC software level supports that particular node model type. For example, you might want to replace a 2145-8F2 node in a test environment with a 2145-8G4 node previously in production that just got replaced by a new 2145-CF8 node.
Note: If you are attempting to replace existing 2145-4F2 nodes with new 2145-CF8 nodes do not use this procedure as you must use the procedure specifically for this sort of upgrade located at the following URL:
This procedure does not require changes to your SAN environment because the new node being installed uses the same worldwide node name (WWNN) as the node you are replacing. Since SVC uses this to generate the unique worldwide port name (WWPN), no SAN zoning or disk controller LUN masking changes are required. READ MORE>
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ProtecTier deduplication offers 25-to-1 reduction and online backup
In June, IBM debuted ProtecTIER* deduplication solutions for AIX* and IBM i. ProtecTIER offers solutions to those who can’t complete backup operations in a given window, have difficulty protecting rapidly growing amounts of data or find their current backup infrastructure unreliable.
With data amounts growing, deduplication is becoming a vital part of data management, backup and recovery. “One of the reasons ProtecTIER is so crucial is because of the crazy growth the world is experiencing as it moves to an all-digital environment,” says Victor Nemechek, ProtecTIER deduplication offering manager at IBM. “Customers are finding their data often doubles or more every year and their current backup systems make it difficult to capture that data, protect it and restore it when they need to.”
For backups many companies use tapes that load data quickly, but present retrieval problems. These challenges—along with reliability problems—sent customers to disk where data was more accessible, but also expensive. Companies used disk for small portions of their most critical data, and kept their other data on tape. “Even with disk for critical data, backup is still an issue because you have a primary disk that you store your data on and you have to have that much disk to back up to, basically doubling your disk needs, and that can be very expensive,” Nemechek says.
“Deduplication can squeeze 25 terabytes of data down to only 1 terabyte of physical disk, so customers can have the speed and reliability of disk but without that one-to-one cost.” —Victor Nemechek, ProtecTIER deduplication offering manager, IBM
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Technology giant IBM on Tuesday said it has emerged as the top player in the Indian external disk storage systems for the year 2010.
According to IT research firm IDC, IBM India has maintained its 2010 leadership with a 26.2 per cent market share (in revenue terms) and over four per cent points lead over its nearest competitor.
“While the overall external disk storage market in India declined to 1.5 per cent in calender year 2010, according to IDC, IBM has been able to grow its hold in the country given the constant innovation and focus on bringing in storage efficiency,” Sandeep Dutta, Storage, Systems and Technology Group, IBM India/ South Asia told PTI.
Also, in Q4 2010, IBM maintained leadership with a 29 per cent market share and a seven per cent point lead over its nearest competitor in revenue terms.
During the year 2010, IBM launched products like IBM StorwizeV7000 and IBM System Storage DS8000, which helped it to strengthen its leadership position in the market.
During the year, IBM bagged orders from Kotak, Suzlon, Oswal mills, CEAT, L&T (ECC division), Indian Farmer and Fertilizer Cooperative Ltd, Solar Semiconductors and Ratnamani Metals. Read More>
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"As the world becomes more interconnected, instrumented and intelligent, more and more information is created. This influx of information creates both challenges and opportunities. Companies must build smarter information infrastructures that can handle all of this information and manage it intelligently. IBM has invested billions of dollars developing smart storage solutions that embody a set of essential technologies: virtualization, thin provisioning, deduplication, compression and automated tiering that will enable you to manage the influx of information and unlock new business opportunities."
In many IT departments, increased user demand has led to haphazard storage growth, resulting in sprawling, heterogeneous storage environments. These environments make it difficult to achieve optimal utilization and to provision storage capacity for new users and applications. Storage virtualization can put an end to these problems. It enables companies to logically aggregate disk storage so capacity can be efficiently allocated across applications and users.
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"Since October 2010 IBM Corp. announced workload-optimized systems to help companies manage a range of more demanding workloads that are placing new stresses on already over-taxed data centers.
The offerings, which span IBM's systems portfolio, represent IBM's investment in systems integrated and optimized across chips, hardware and software, for a range of work at a time when companies face amounts of data and are under pressure to become more efficient in managing and drawing timely insights from the information.
The new systems include: A new offering for the zEnterprise BladeCenter Extension (zBX), IBM's systems design that allows workloads on mainframe servers and other select systems to share resources and be managed as a single, virtualized system; and key new Storage and System x products, which can bring new levels of efficiency to the data center."