SAN Volume Controller: Best Practices and Performance Guidelines

Chapter 1.1.11. Common topology issues

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8 SAN Volume Controller: Best Practices and Performance Guidelines 1.1.11 Common topology issues In this section, we describe common topology problems encountered. Accidentally accessing storage over ISLs One common topology mistake that we have encountered in the field is to have SVC paths from the same node to the same disk array on multiple core switches that are linked together ( see Figure 1- 4). This is commonly encountered in environments where the SVC is not the only device accessing the disk array. Figure 1- 4 Spread out disk paths If you have this type of a topology, it is very important to zone the SVC so that it will only see the paths on the same switch as the SVC nodes. Because of the ...