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EMC Symmetrix Solutions Expert Exam for Technology Architects Sample Questions:

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

2. Click on the calculator icon in the upper left corner. A customer is implementing an Exchange environment on an EMC Symmetrix VMAX. The environment will be deployed on 600 GB FC 15K drives using RAID 5 data protection. The application generates 2000 I/O per second with an I/O pattern that is 75% reads and 25% writes. What is the minimum number of drives recommended to support the application?

A) 12
B) 32
C) 24
D) 18

3. Refer to the exhibit.

A customer is planning to replace an end-of-lease DMX-2500 with a new two engine VMAX. Because the customer has reported some performance issues with the DMX, you have been asked to analyze the DMX and recommend the VMAX configuration. This customer's plan is for 10% growth over the next 24 months. The DMX has 256GB cache and 380 x 300GB-10K FC drives. To avoid past performance issues but keep the cost low, which configuration should be recommended?

A) 424 x 300GB-15K FC drives
B) 424 x 300GB-10K FC drives
C) 318 x 450GB-15K FC drives
D) 212 x 600GB-10K FC drives

4. Refer to the exhibit.

A customer has a Symmetrix VMAX storage array which had a capacity add completed after one year of service. Performance for a specific host application with large block I/O has not achieved expected levels of performance. The customer requests a performance review and determination of the problem.
You determine that FA processors are running 52% busy, FA ports have an average of 30 MB/s and disks in the thin storage pool are 28% utilized. Which cost effective solution should be suggested?

A) Use more paths to host
B) Add more cache
C) Migrate to Meta volumes
D) Add drives to disk pool

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

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