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EMC Symmetrix Solutions Design Exam for Technology Architects Sample Questions:

1. A customer plans to configure their new Symmetrix VMAX 20K. They want your advice on how to configure a storage pool. This new storage pool will handle large block, sequential write I/O.
What advice should be provided about RAID types as they relate to performance?

A) RAID type does not matter since everything in the VMAX goes through cache.
B) Use RAID 5 because it can be more efficient for sequential writes than RAID 1.
C) Use RAID 1 because RAID 5 will have an overhead penalty.
D) Use RAID 6 because both RAID 1 and RAID 5 have a higher overhead penalty.

2. You are designing the Symmetrix VMAX architecture for a DAS-to-SAN SQL Server migration. Currently all user databases reside on a single locally-attached disk enclosure, mounted to "M:\". You have decided on RAID-1 protected 15,000 RPM drives for the new SQL environment.
Last week, you configured Perfmon to record the current IOPS load of the databases during the 8-hour business day, Monday through Friday as shown in the exhibit. During an average business day, the transaction log processes 43 GB worth of data.

Following EMC best practices, which discount can be taken from the overall write IOPS when calculating for the database writes?

A) 196
B) 392
C) 597
D) 989

3. You are designing an SRDF/A solution with Symmetrix VMAX 40K arrays. TimeFinder/Snap will be used to replicate the remote devices.
What is a design consideration?

A) Delta Set Extension should be implemented
B) Transmit Idle should be enabled
C) Device Write Pacing should be enabled
D) Group Write Pacing should be enabled

4. Using SRDF/S, In Enginuity 5772 and later, How many concurrent writes can a device receive?

A) 8
B) 16
C) 6
D) 2

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

Solutions: