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EMC Symmetrix Solutions Expert Exam for Technology Architects Sample Questions:

1. A new data warehouse will be hosted on an existing 4-engine VMAX array. The database server has 4 HBAs connected at 8Gb/s. Due to limited SAN switch ports only port 0 on each VMAX FA is connected - also at 8Gb/s.
The workload is expected to require at least 1700MB/s of reads @ 128KB I/O size. It must maintain performance in case of any major component failure in the host, switch or array. Assume that the existing workload on the VMAX does not exceed 350MB/s per port. Also assume that the ports can sustain up to 500MB/s without exceeding 70% utilization.
What is the best practice HBA to FA mapping to ensure the required performance of the data warehouse?

A) HBA0 -> E1 FA ports HBA1 -> F1 FA ports HBA2 -> G1 FA ports HBA3 -> H1 FA ports
B) HBA0 -> FA 7e0, 8e0, 9e0, 10e0 HBA1-> FA 5e0, 6e0, 11e0, 12e0 HBA0 -> FA 7h0, 8h0, 9h0, 10h0 HBA1-> FA 5h0, 6h0, 11h0, 12h0
C) HBA0 -> Engine 3 FA ports HBA1 -> Engine 4 FA ports HBA2 -> Engine 5 FA ports HBA3 -> Engine 6 FA ports
D) HBA0 -> E0 FA ports HBA1 -> F0 FA ports HBA2 -> G0 FA ports HBA3 -> H0 FA ports

2. During a Symmetrix VMAX performance analysis, you notice that a collection of VMAX devices has front-end I/O rates that are much higher than the back-end I/O rates. What might be the reason for this?

A) Workload has a high percentage of read hits.
B) Devices are replicated with TimeFinder/Clone
C) Devices are RAID 5 protected.
D) Workload has a high percentage of writes.

3. A customer is implementing a new ESXi cluster and will be provisioning 50TB of storage from Symmetrix Pool Storage. The size of the LUNS being presented is 150GB. Based on EMC Best Practices, on how many storage ports should LUNS be presented?

A) 2
B) 5
C) 3
D) 4

4. Host A and Host B are connected to a Symmetrix VMAX, the hosts do not share volumes. The customer plans to implement PowerPath Encryption on Host A.
Which action will be required on Host B.?

A) Install the same PowerPath Encryption key on Host B
B) No action required. Host B will continue to operate normally
C) Stop operations on Host B during the installation
D) Install a new PowerPath Encryption key on Host B

5. A data warehouse team is reporting poor performance on their batch reports. The database runs on a Solaris host connected to a DMX-4 array with Fibre Channel drives sized to support a sequential read workload. Which ratio in Performance Manager metrics would be most useful in diagnosing the performance issue?

A) I/O per second vs. Average sampled read time
B) KBytes read per second vs. I/O per second
C) Read % vs. Write %
D) Prefetched tracks per second vs. Tracks not used per second

Solutions: