EMC Technology Architect E20-326 Questions & Answers

• Question 211:

  Which condition results in effective prioritization by Symmetrix Priority Controls (SPC)?

  A. Application classes are isolated on different disks/tiers.

  B. Different application classes share the same physical disks.

  C. Applications share the same physical disks and have different IO profiles.

  D. Applications share the same physical disks and are active at different times,

  Correct Answer: B

• Question 212:

  A storage administrator receives a warning message that one of the thin pools in the Symmetrix is low on storage space. The pool contains a large number of thin devices that have been fully preallocated but have small amounts of used space. What is the least disruptive and most cost effective way to make more thin pool space available?

  A. Run zero space reclamation on the thin devices

  B. Add more data devices to the thin pool

  C. Unbind the underutilized thin devices from the pool

  D. Rebalance the pool

  Correct Answer: A

• Question 213:

  What can happen if an over-subscribed thin pool becomes full?

  A. writes to unallocated extents on TDEV's fail and an I/O error is returned. If the host is booting from SAN, this may also result in a server hang condition.

  B. writes to unallocated extents on TDEV's continue within cache and the virtual pool is automatically expanded to the needed level.

  C. writes to unallocated extents on TDEV's stay in a queued state until the storage administrator can assign additional capacity.

  D. writes to unallocated extents on TDEV's continue within cache and the virtual pool is not automatically expanded to the needed level.

  Correct Answer: A

• Question 214:

  A Symmetrix VMAX hosts four applications. Each application is assigned a named dynamic cache partition. Two of the partitions are static and two are flexible. The write pending limit for each partition is set to 60%.

  What will happen if an application running in a static partition reaches the write pending limit set for that partition?

  A. Cache will be borrowed from a flexible partition

  B. Cache will be borrowed from the default partition

  C. Host write activity to that partition will be throttled

  D. The write pending limit of the partition will be raised until it reaches 80%

  Correct Answer: C

• Question 215:

  A customer is using virtual provisioning on a Symmetrix VMAX which is being shared for Production and

  non-production workloads.

  What can be used to separate the different workloads?

  A. Dynamic Cache Partitioning

  B. Symmetrix Priority Controls

  C. Write Pending Limit

  D. FAST VP

  Correct Answer: A

• Question 216:

  You are designing a new VMAX implementation. All applications will share physical drives and participate in SRDF/S replication.

  The customer has two high I/O applications used for OLTP and a several low I/O applications used for testing. The customer wants to ensure the high I/O applications take precedence over the low I/O applications on the VMAX array. What do you recommend?

  A. Implement Symmetrix Priority Controls.

  B. Configure striped metavolumes.

  C. Implement SRDF Consistency Groups.

  D. Configure concatenated metavolumes.

  Correct Answer: A

• Question 217:

  A Symmetrix VMAX has been configured with Dynamic Cache Partitions. What is a criterion that must be met for a cache slot to be eligible for donation?

  A. The fall through time must be greater than the donation age

  B. The fall through time must be less than the donation age

  C. The cache slot must belong to a static partition

  D. There must be available cache slots in the default partition

  Correct Answer: A

• Question 218:

  A Symmetrix VMAX hosts four applications. Each application is assigned a named dynamic cache partition. Two of the partitions are static and two are flexible. The write pending limit for each partition is set to 60%.

  What will happen if an application running in a flexible partition reaches the write pending limit set for that partition?

  A. Host write activity to that partition will be throttled

  B. Cache will be borrowed from the other flexible partition

  C. Cache will be borrowed from the default partition

  D. The write pending limit of the partition will be raised until it reaches 80%

  Correct Answer: A

• Question 219:

  You are designing a new VMAX array. The customer's primary concern is maximizing capacity available to the host. What RAID protection should you recommend?

  A. RAID-5 (7+1)

  B. RAID-6 (6+2)

  C. RAID-1/0

  D. RAID-5 (3+1)

  Correct Answer: A

• Question 220:

  What is a best practice when configuring a Symmetrix VMAX for optimal performance and cost?

  A. Different drive types are mixed and spread throughout the array.

  B. Dedicated engines have appropriate drive types to meet application needs.

  C. A dedicated array with Enterprise Flash Drives (EFD).

  D. A dedicated array based upon application requirement.

  Correct Answer: A