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EMC Symmetrix Solutions Expert Exam for Technology Architects Sample Questions:

1. A new EMC customer recently installed their first VMAX and a complete suite of EMC management tools. Their lead capacity planner attended training and has started monitoring the VMAX. You receive a call and this person describes the measurements observed. During the period of heaviest workload, reported throughput on certain Fibre Channel ports is nearing 150,000 KB/second but those ports display only about 10% utilization. What is the likely cause?

A) I/O block size is very large
B) Sequential prefetch skews throughput %
C) Striped metavolumes report invalid IOPS
D) I/O block size is very small

2. What is a write pending slot in a Symmetrix VMAX?

A) Any cache slot with data written from the host
B) A cache slot that is yet to be replicated to the remote array
C) A cache slot that the host is about to write to
D) A cache slot with data that has not yet been destaged to disk

3. A company is evaluating SRDF/Star. They are concerned that the RDF daemon represents a single point of failure. How could this concern be addressed?

A) RDF daemon process runs on the Symmetrix array and has built-in redundancy.
B) RDF daemons will be deployed on one management station at each of the three sites. If the workload site RDF daemon fails, one of the RDF daemons from the other two sites will take over.
C) RDF daemons will be deployed on multiple management stations at the workload site. The RDF daemons will cooperate with each other.
D) RDF daemon process runs on the Symmetrix array. If the workload site RDF daemon fails, the RDF daemon from one of the other sites will take over.

4. Click on the calculator icon in the upper left corner.
A new storage request is submitted for the production instance of an new application from development. The request is for 3 x 200GB LUNs on a recently purchased VMAX array.
While discussing the request with the application team they mention that performance of their test environment has been poor during load testing on an existing DMX-4 array. You check Performance Manager statistics for the DMX-4 and discover that they are using 3 x 100GB LUNs for testing and they are sometimes reaching Device Write Pending.
What will best avoid the Write Pending issue in production?

A) Allocate 3 x 200GB devices and reduce the System Write Pending limit to 70%
B) Allocate 3 x 200GB devices and increase the Device Write Pending limit to 10%
C) Allocate 3 x 4-way striped meta devices using 200GB hypers
D) Allocate 3 x 4-way striped meta devices using 50GB hypers

5. A VMware customer noticed slow performance of virtual machines hosted on an ESXi host. Which value indicates that the ESXi host is overloaded and is causing virtual machine slow performance?

A) Load average = 0.1
B) Load average = 0.5
C) Load average >= 1
D) Load average <1

Solutions: