EMC EMC Certifications E20-807 Questions & Answers

• Question 51:

  In an SRDF/Metro environment, where is the vWitness lock service, -storwlsd, running?

  A. On the vWitness instance

  B. On the target array

  C. On the source array

  D. On the production host

  Correct Answer: A

  Reference: https://www.emc.com/collateral/technical-documentation/h14556-vmax3-srdf-metro-overview-and-best-practices-tech-note.pdf?isKoreaPage=falseanddomainUrlForCanonical=https%3A%2F%2Fwww.emc.com (15)

• Question 52:

  Based on the exhibit, which user(s) can enable/disable symauth?

  

  A. Bob and Frank

  B. Jackie, Jenn, and Jill

  C. Beth

  D. Bob, Frank, and Beth

  Correct Answer: A

• Question 53:

  Which role does the Unisphere for VMAX initial setup user have after the creation of a new user with the "Admin" role?

  A. SecurityAdmin

  B. None

  C. Admin

  D. Auditor

  Correct Answer: B

• Question 54:

  An administrator implemented SYMACLs on a VMAX3 using hardware-based Access IDs. The administrator is not able to run SYMCLI commands against the volumes belonging to a host. The volumes were originally provisioned using the host in which the host in which the administrator experienced issues.

  What is a possible reason for this issue?

  A. SYMAPI options file was manually modified with the wrong host ID

  B. symacl –unique –passphrase was run using a different passphrase

  C. Host is not in the eMgmt Access Group

  D. Host network interface card was replaced

  Correct Answer: B

• Question 55:

  A company is using a local VMAX3 for production and another VMAX3 on a remote location for disaster recovery purposes that is 5000 kilometers away. Which SRDF mode supports an RPO of 2 seconds?

  A. SRDF/S

  B. SRDF/A

  C. SRDF.DM

  D. SRDF/A MSC

  Correct Answer: B

  Reference: https://taiwan.emc.com/collateral/technical-documentation/h14556-vmax3-srdf-metro-overview-and-best-practices-tech-note.pdf

• Question 56:

  A VMAX3 array has been configured to use TimeFinder SnapVX. A snapshot is taken of a LUN that currently resides on a 10k drive. Which mechanism will SnapVX use when there is a write to a linked target volume?

  A. COFW

  B. ROW

  C. ACORW

  D. COW

  Correct Answer: B

• Question 57:

  Which feature does the embedded eDPM server support on a VMAX3?

  A. eNAS

  B. FAST.X

  C. D@RE

  D. ESRS

  Correct Answer: C

  Reference: https://www.emc.com/collateral/white-papers/h13936-emc-vmax3-data-rest-encryption-wp.pdf (5)

• Question 58:

  On a VMAX3 array, under which type of workload will Selective Cache Mirroring provide significant performance optimization?

  A. Large block Write Miss I/Os

  B. Small block Write Hit I/Os

  C. Large block Read Miss I/Os

  D. Large block Read Hit I/Os

  Correct Answer: A

• Question 59:

  While analyzing performance of a VMAX3 array, the following details are observed?

  High host response time Low FE response time High host CPU utilization

  What should be investigated further?

  A. SAN connectivity

  B. Disk delays

  C. I/O queuing on the host

  D. I/O queuing on the frontend

  Correct Answer: C

  Reference: https://thesanguy.com/2012/09/25/san-performance-metrics/

• Question 60:

  What is the effective queue depth of a device mapped to a host with eight paths on a VMAX3 array?

  A. 64

  B. 128

  C. 256

  D. 512

  Correct Answer: C