EMC E20-326 Online Practice Questions and Exam Preparation

EMC E20-326 Online Questions & Answers

• Question 171:

  What is a feature of Delta Set Extension pools?

  A. An SRDF/A group can be associated with different pools, regardless of protection or emulation type.
  B. DSE pools can be shared between multiple SRDF/A groups.
  C. DSE Pools are only required at the R1 side.
  D. RAID5 with 15krpm disks is recommended for optimal performance of a DSE pool.
  B. DSE pools can be shared between multiple SRDF/A groups.

• Question 172:

  When does the ACOFW behavior apply in a TimeFinder/Snap environment?

  A. Writes to protected tracks on the source device
  B. Writes to protected tracks on the virtual device
  C. All writes to the source device
  D. All writes to the virtual device
  A. Writes to protected tracks on the source device

• Question 173:

  A customer plans to configure a storage pool on their new Symmetrix VMAX 20K. The pool must be able to withstand a dual drive failure and still offer guaranteed data access. Which RAID type should be used?

  A. Striped RAID 1
  B. RAID 5
  C. RAID 6
  D. RAID type does not matter
  C. RAID 6

• Question 174:

  A proposed SRDF/S solution was modeled with BCSD. The model assumed that the Source array had 2 RFs.

  The RA utilization chart shows the maximum utilization at 80%. How many RFs should be recommended to ensure a successful implementation?

  A. 2
  B. 4
  C. 3
  D. 6
  B. 4

• Question 175:

  Which environment type is thin provisioning friendly?

  A. Document and media repositories
  B. File systems that append data instead of reusing free space
  C. Utilities that copy "raw" data such as dd in UNIX
  D. Administrative operations such as bad block detection
  A. Document and media repositories

• Question 176:

  What determines the maximum cache requirements when modeling an SRDF/A Delta Set Extension configuration?

  A. Transmit Idle time for the peak workload
  B. Peak Cycle time for the peak workload
  C. Sum of the data changed for N and N+1 cycles without modification
  D. Sum of the data changed for N and N+1 cycles, modified by the Write Load Adjustment factor
  A. Transmit Idle time for the peak workload

• Question 177:

  Which SRDF/A feature is recommended for improving resiliency from link outages?

  A. Delta Set Extension
  B. Increased cache size
  C. Link Limbo Timer
  D. Write Pacing
  A. Delta Set Extension

• Question 178:

  You have been assigned to gather performance data for a Microsoft SQL server database that will be migrated to a Symmetrix VMAX. Which Perfmon counter must be measured prior to designing a disk layout?

  A. Physical Disk\Disk Writes/sec
  B. Physical Disk\Avg. Disk sec/Write
  C. Logical Disk\Avg. Disk Bytes/sec
  D. Logical Disk\Disk Write Bytes/sec
  A. Physical Disk\Disk Writes/sec

• Question 179:

  What type of configuration change takes a backend device lock on Symmetrix VMAX?

  A. Device Masking
  B. Changing disk types including physical groups
  C. Deletion of disks in a new configuration
  D. Changing the FA port flag setting
  A. Device Masking

• Question 180:

  As a general rule when designing a Symmetrix VMAX array, which maximum percentage of utilization should be maintained for performance critical configurations?

  A. 50
  B. 66
  C. 70
  D. 75
  A. 50