EMC EMC Certifications E20-507 Questions & Answers

• Question 121:

  SRDF/A has been enabled between two VMAX3 arrays. Due to a loss of all RDF links, the SRDF/A session has been placed in a Transmit Idle state. What happens to cycle switching and the delta sets?

  A. Cycle switching continues; Transmit Delta set count grows

  B. Cycle switching stops; Capture Delta set grows

  C. Cycle switching stops; Transmit Delta set grows

  D. Cycle switching continues; Capture Delta set count grows

  Correct Answer: A

• Question 122:

  What would the RDF device and Link states be after an SRDF Establish operation?

  A. R1=RW; Link=RW; R2=WD

  B. R1=WD; Link=NR; R2= RW

  C. R1=RW; Link=NR; R2=RW

  D. R1=RW; Link=NR; R2=WD

  Correct Answer: A

  Reference: http://richgoldstein.net/content/emc/srdf_intro (see the table)

• Question 123:

  What should be done, from an application perspective, prior to performing an SRDF Restore operation?

  A. Stop accessing the R1 and R2 devices

  B. Stop accessing the R1 devices; continue accessing the R2 devices

  C. Continue accessing the R1 devices; stop accessing the R2 devices

  D. Continue accessing the R1 and R2 devices

  Correct Answer: A

• Question 124:

  Which SRDF/A feature provides increased replication resiliency from temporary spikes in write workloads or link loss?

  A. Delta Set Extension

  B. SRDF FAST Coordination

  C. Multi-Session Consistency

  D. Software Compression

  Correct Answer: A

• Question 125:

  What would the RDF device and Link states be after an SRDF Update operation?

  A. R1=WD; Link=RW; R2=RW

  B. R1=RW; Link=RW; R2=WD

  C. R1=RW; Link=NR; R2=RW

  D. R1=WD; Link=NR; R2=RW

  Correct Answer: B

  Reference: http://richgoldstein.net/content/emc/srdf_intro (see the table)

• Question 126:

  For devices replicating in SRDF/A mode, which SRDF pair state will confirm active asynchronous replication protection?

  A. Consistent

  B. SyncInProg

  C. Synchronized

  D. UpdateInProg

  Correct Answer: C

• Question 127:

  A storage administrator needs to provision new storage to a production SRDF/A group. Before moving new SRDF pairs to an active SRDF/A session, what should the SRDF pair state be for the new devices?

  A. Suspended

  B. Consistent

  C. SyncInProg

  D. Synchronized

  Correct Answer: A

  Reference: http://richgoldstein.net/content/emc/srdf_intro

• Question 128:

  A VMAX3 storage administrator wants to perform a SRDF data validation test on R2 without impacting production host processing. Which SRDF operation should be used?

  A. Split

  B. Failover

  C. Swap

  D. Suspend

  Correct Answer: A

• Question 129:

  A VMAX3 system administrator needs to create a SRDF relationship for a planned data migration. Which replication mode of SRDF is recommended for the initial bulk data transfer?

  A. Adaptive Copy Disk

  B. Synchronous

  C. Asynchronous

  D. Adaptive Copy Write Pending

  Correct Answer: A

  SRDF/Synchronous (SRDF/S), SRDF/Asynchronous (SRDF/A), and SRDF Adaptive Copy are the basic operation modes of SRDF. The first two are valid for Oracle database protection and maintain dependent write-order consistency. The third is useful for bulk data transfers or in combination with more complex SRDF solutions such as SRDF/Automated Replication (SRDF/AR)

• Question 130:

  An application is using four VMAX3 devices. A TimeFinder SnapVX snapshot of the Storage Group containing these devices is created at 10 AM. The storage administrator adds another device to this Storage Group at 2 PM. A second

  snapshot of the Storage Group is created at 3 PM. A restore operation is performed at 4 PM using the 3 PM snapshot.

  What will be the status of the newly added device, after the restore operation?

  A. Failed

  B. Not Ready

  C. Write disabled

  D. Read/Write enabled

  Correct Answer: D

  Reference: http://ireland.emc.com/collateral/TechnicalDocument/docu68926.pdf