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EMC Symmetrix Solutions Design Exam for Technology Architects Sample Questions:

1. An existing TimeFinder customer migrated from a DMX-3 running Enginuity 5771 to a new VMAX array. A colleague advised them TimeFinder/Clone performance would improve on the VMAX due to changes to the Copy on First Write (COFW) mechanism. The customer asks you to explain how the COFW mechanism changed on the VMAX.
What do you advise the customer?

A) Uses synchronous copy on first write (COFW), which has no COFW penalty.
B) Uses synchronous copy on first write (COFW), which completes protected writes in cache.
C) Uses asynchronous copy on first write (ACOFW), which has no COFW penalty.
D) Uses asynchronous copy on first write (ACOFW), which holds protected writes in cache.

2. Refer to the exhibit.

You have used BCSD to model an SRDF/A solution. Based on the SRDF/A risk analysis shown what are your recommendations?

A) Ensure that the SRDF devices on the source and target arrays reside on disks with the same RPM. Provide more remote adapters.
B) Provide more bandwidth and cache.
C) Provide more remote adapters. Upgrade both arrays to Symmetrix VMAX.
D) Ensure that the SRDF devices on the source and target arrays use the same protection. Provide more bandwidth.

3. What is the most important advantage of implementing an ASM, Oracle 11g application on an existing Symmetrix array?

A) Added volumes to the ASM disk group will re-stripe the data across all target Oracle volumes.
B) Added volumes to an ASM instance would rebalance all existing Oracle objects automatically.
C) Added new volumes to the ASM disk group will enable the DBA to issue an ASM rebalance command.
D) Added volumes to the ASM disk group will automatically re-stripe the data across the target TimeFinder/Clone volumes.

4. You are designing an SRDF/S solution. Network bandwidth can be purchased in increments of single OC3 (155 Mb/s) links. Data compression is not in use. The workload profile is as follows:
Total I/Os per second = 30,000
Read block size = 4 KB
Write block size = 4 KB
Writes = 30%
How many OC3 links should be recommended?

A) 2
B) 4
C) 8
D) 6

5. What is the effect of block size on response times in an SRDF/S environment?

A) Larger block size applications experience higher response times
B) Smaller block size applications experience higher response times
C) Block size has no effect on response times
D) Larger block size applications have the same response times as smaller block size applications

Solutions: