E20-807 Online Practice Questions and Answers

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

A new VMAX3 array has been added to the environment. Unisphere for VMAX has discovered the array and can be used to manage the array. However, Unisphere is not able to collect any performance data for the array.

What is a possible cause?

A. Registration for performance data collection has not been done

B. Performance data repository is full

C. storgnsd daemon is not running

D. Root Cause Analysis Interval was changed

Based on business requirements, Concurrent SRDF/Star has been implemented with host infrastructure at the Workload and Asynchronous sites. A disaster fault has occurred. Star query shows:

Which site should the workload be moved to and which site's data should be kept?

A. Switch to the Synchronous site Keep the Synchronous site data

B. Switch to the Asynchronous site Keep the Asynchronous site data

C. Switch to the Synchronous site Keep the Asynchronous site data

D. Switch to the Asynchronous site Keep the Synchronous site data

To determine Service Level Objective compliance on a VMAX3, where is the I/O response time measured?

A. Frontend Directors

B. Host Bus Adapters

C. SAN Switches

D. Backend Directors

Refer to the Exhibit.

Which port assignments for external array connectivity satisfy high availability and best practices for a dual engine VMAX3 configuration with FAST.X?

A. Director 1 port 4, Director 1 port 5 Director 4 port 4, Director 4 port 5

B. Director 1 port 4, Director 1 port 9 Director 1 port 24, Director 1 port 31

C. Director 1 port 4, Director 1 port 9 Director 2 port 4, Director 2 port 9

D. Director 1 port 4, Director 2 port 4 Director 1 port 8, Director 4 port 24

A VDI deployment is planned for an environment that consists of VMAX3 and XtremIO. The data will have a high degree of deduplication and will require QoS and VVOL support. How can the existing infrastructure be leverage while minimizing increased storage capacity?

A. Use XtremIO for the new deployment

B. Use FAST.X with XtremIO for the new deployment

C. Add full capacity required for VMAX3

D. Add half the capacity required for the VMAX and use compression

Which Dell EMC VMAX3 point-in-time replication technology allows snapshots to be created without requiring a target volume?

A. TimeFinder SnapVX

B. ProtectPoint

C. SRDF/Asynchronous

D. Open Replicator

A company is evaluating the deployment of SRDF/Star on VMAX3 arrays. One of the concerns is that the SRDF daemon represents a single point of failure.

How could this concern be addressed?

A. RDF daemon process runs on the embedded Tools Virtual Machines and has built-in high availability.

B. Run RDF daemons on multiple management stations at the workload site. RDF daemons will cooperate with each other.

C. Run an RDF daemon on one management station at each of the three sites. If the workload site RDF daemon fails, one of the RDF daemons from the other two sites will take over.

D. RDF daemon process runs on the VMAX3 array. If the workload site RDF daemon fails, the RDF daemon from one of the other sites will take over.

On a VMAX3 array, when will the backend director give equal priority to read miss and destage operations?

A. At 5% of the System Write Pending Limit

B. At 50% of the System Write Pending Limit

C. At 75% of the configured cache in the array

D. At 75% of the SRDF/A cache usage

What is in accurate statement about Unisphere for VMAX and Solutions Enabler permission management?

A. Authorization checking is disabled by default for Unisphere and Solutions Enabler and must be enabled before configuring permissions

B. Solutions Enabler can assign up to four roles per user and Unisphere can only assign up to two roles per user

C. Unisphere and Solutions Enabler permission information is maintained in separate symauth databases

D. Unisphere has a more explicit authentication mechanism for users while Solutions Enabler uses the operating system user credentials

By default, how many days of the data are retained if Unisphere for VMAX is configured with a Root Cause Analysis Interval of 10 minutes?

A. 15

B. 30

C. 45

D. 60

Which special considerations are required for non-ALUA arrays and FAST.X?

A. Non-ALUA Controllers are not supported

B. Remote Controllers can only be connected to a single port on the VMAX3 array

C. Remote Controllers must be zoned to ports on different directors

D. Remote Controllers must be zoned to ports on a single director

Which SYMCLI command can be used to confirm that eDisk have been created when using FAST.X?

A. symcfg

B. symdisk

C. symaccess

D. symsan

In an SRDF/Metro environment, what is a requirement for an Array Witness?

A. Witness RDF between the source and the target

B. Witness RDF group on the witness array containing the source and the target SRDF/Metro devices

C. One RDF group on the witness array to both the source and the target

D. Two RDF groups on the witness array; one to the source and one to the target

On a VMAX3 array, for which type of workload does FlashBoost help in optimizing performance?

A. Sequential Reads

B. Sequential Writes

C. Random Writes

D. Random Reads