E20-885 Online Practice Questions and Answers

A customer has two EMC VNX configured to replicate between sites. Each VNX has dual Control Stations. The primary Control Station at the source site fails at 6 p.m. and reboots. At 8

A. m., the customer completes DR testing and observes CIFS replication does not failover to the target site VNX. Why does CIFS replication not failover to the target VNX during the DR test?

B. The control station of the primary VNX should have been failed back.

C. The control station of the second VNX should have been failed over.

D. The control station of the primary VNX should have IP bounding enabled.

E. The control station of the secondary VNX should have IP bounding enabled.

Click on the calculator in the upper left-hand corner.

An Exchange 2010 environment with 60% reads and 40% writes will be configured on an EMC VNX using RAID 1/0 15K SAS drives. The total I/O per second required is 3,000. Accounting for additional overhead for spikes, what is the number of spindles required?

A. 32

B. 24

C. 30

D. 28

A customer uses Replication Manager Version 5 to make replicas of their Windows 2003 server. The customer installs a new Windows 2008 server and tries to mount the replica. The customer reports they cannot mount the replica to the new server. What is the likely issue?

A. Windows 2003 data can only be mounted on Windows 2003 hosts.

B. Replication Manager is not installed on the new server.

C. Replication Manager only supports Windows 2003.

D. Windows 2008 Replication License is installed.

A customer is migrating between two VNX arrays using SAN Copy. The SAN Copy session was created on the target VNX. They need to determine the downtime window needed for host cutover. Which do you recommend?

A. Plan for an extended downtime window and perform a full SAN Copy session.

B. Plan for a minimal downtime window and perform an incremental SAN Copy session.

C. Plan for no downtime and perform a full SAN Copy session.

D. Plan for no downtime and perform an incremental SAN Copy session.

A customer plans to move a performance-sensitive application to a new EMC VNX with all SAS drives. The application will reside on an NFS export, and the customer requires the file system provide consistent performance. The customer also needs to create additional CIFS shares, which do not share the same performance requirement. How should both sets of file systems be created?

A. Place four dvols in a user-defined pool for the NFS-exported file systems and let AVM manage the CIFS file systems with system-defined pools.

B. Place five dvols in a user-defined mapped pool for the NFS-exported file systems and let AVM manage CIFS file systems with system-defined pools.

C. Place four dvols in a system-defined pool for the NFS-exported file systems and let AVM manage the CIFS file systems with user-defined pools.

D. Place five dvols in a system-defined mapped pool for the NFS-exported file systems and let AVM manage the CIFS file systems with user-defined pools.

A customer is migrating an Oracle database to a new EMC VNX. The database consists of random, small I/O workloads with high transaction rates.

What RAID type should be used for the LUN containing the data files in order to prevent I/O bottlenecks during peak load?

A. RAID 6

B. RAID 3

C. RAID 1/0

D. RAID 5

When creating a clone, what size must the clone be when compared to source LUN?

A. Half the size of the source LUN

B. Same size of the source LUN

C. Two times larger than the source LUN

D. Four times larger than the source LUN

A heterogeneous Pool is created as follows:

5 x 200 GB FAST VP optimized Flash drives, configured as 4+1 R5 10 x 600 GB 10K rpm SAS drives,

configured as 4+1 R5 16 x 2 TB NL-SAS drives, configured as 6+2 R6

Ten equal-sized thick LUNs are created on the pool at 5 minute intervals. No space is left in the pool. All

parameters are left at the default value. Testing is started at 9:00 A.M. on the 10 LUNs using IOmeter. The

R/W ratio for the testing is set at 3:1, and 4 kB random I/Os are performed.

What throughput do you expect to see from the LUN that was created second?

A. 480 IOPS

B. 960 IOPS

C. 4,100 IOPS

D. 5,600 IOPS

A customer requires their FAST Cache configuration to be destroyed in order to increase FAST Cache size. However, they are concerned about the performance impact that this will cause.

What should you tell the customer to expect?

A. Increased write activity on data disks from LUNs that were FAST Cache enabled

B. Increased write activity on FAST Cache disks from LUNs that were FAST Cache enabled

C. Temporary suspension of all write I/O to DRAM cache

D. Temporarily bypass of DRAM cache by all write I/O

A customer has two VNX systems: At the local site, a VNX capable of performing 20,000 LUN IOPS At the remote site, a VNX capable of performing 14,000 LUN IOPS

At the local site, application LUNs to be mirrored to the remote site perform 2,000 random 4 kB IOPS, with a R/W ratio of 3:1. At the remote site, application LUNs to be mirrored to the local site perform 1,200 random 8 kB IOPS, with a R/W ratio of 2:1. The utilization of both systems must be 70% or lower. MirrorView/A will be used to replicate the data.

How much throughput can be performed by other applications at the local and remote sites?

A. Local: 9,600 IOPS; Remote: 5,600 IOPS

B. Local: 16,800 IOPS; Remote: 10,800 IOPS

C. Local: 12,000 IOPS; Remote: 8,600 IOPS

D. Local: 18,000 IOPS; Remote: 12,800 IOPS