E20-880 Online Practice Questions and Answers

A VNX storage system is being configured to provide storage for an Exchange 2010 implementation for 2,000 users. Performance and reliability are more important than cost for the customer. What RAID configuration should be used?

A. A RAID 1/0 Group, spread across two DAEs on two separate storage system busses

B. Two RAID 5 Groups in a striped metaLUN across two DAEs, one from each back end bus

C. A RAID 1/0 Group on a single DAE

D. A RAID 6 Group which can accommodate two simultaneous drive failures

As a result of suffering a catastrophic failure, your customer has requested a DR solution. The solution must introduce a higher level of availability for their Exchange 2010 system. The customer wants a strategy that involves Replication Manager and DAG with third-party replication enabled.

In what state(s) of the database would the replication occur?

A. Active only

B. Either active or passive

C. Passive only

D. Neither active nor passive

A company has two data centers. They run multiple Exchange servers in each data center in a virtualized environment. The Exchange Admin would like the storage for each Exchange server to be configured to provide the most flexibility for migrating virtual machines between physical servers. VSS tools for application consistency compatibility needs to be maintained.

How should the storage for the Exchange virtual machine be allocated to the hypervisor?

A. Place the Exchange databases and logs on RDMs. Place the boot device for the VM on a VMFS volume.

B. Place the virtual machine files and exchange data files on a single VHD to allow maximum portability and failover.

C. Configure the DAG to save and restore its state when taken offline or moved.

D. Place the virtual machine files, database, and log each in a separate VMFS.

You have designed an Auto-tiering solution using Flash, SAS, and NL-SAS disks in your storage pool. Your design was implemented and scheduling has been running daily. The customer reports that there is no data in the NL-SAS tier.

Why is this the case?

A. Data was previously moved to another tier

B. Scheduling is not required for this configuration

C. Tiering is set up for Lowest Available Tier

D. There was no data in the Flash drives to start with

A customer's database resides on a RAID 5 Pool with SAS drives.

Which best practice should be followed to optimize Reserved LUN Pool disk performance?

A. Use a mix of both SAS and NL-SAS disks from the same Pool as the database

B. Use equal size thin LUNs from the same Pool as the database

C. Use only SAS disks on dedicated RAID Groups

D. Use only NL-SAS II drives on dedicated RAID Groups

Refer to the exhibit.

A junior architect on your team has asked for your assistance in analyzing performance metrics from a customer's array. You have been provided with the exhibit, which depicts two devices and their associated workloads.

Which answer best describes what is occurring?

A. Saturation

B. Burstiness

C. Sequential I/O

D. Random I/O

What is the best practice for configuring VNX OE File SavVol LUNs?

A. They should use a separate storage pool whenever possible

B. You should always enable fast cache for SavVol LUNs

C. Never use NL-SAS for SavVol LUNs for SAS pools

D. Create SavVol LUNs using manual volume management

During decompression with default settings, if the pool becomes too full, decompression will be paused but host I/O can continue. At what percent full will host I/O be terminated to the LUN?

A. 91%

B. 98%

C. 100%

D. 80%

When using VNX Replicator for File why is it important to configure the SavVol on different drives from the PFS whenever possible?

A. So that VNX Replicator will not read from the PFS drives while it is in use.

B. Writes to the PFS can change the data in the SavVol while it is being used in a replication.

C. When the SavVol and PFS are on the same spindles the size of DFS must be equal to or greater than the SavVol plus the PFS.

D. VNX Replicator will become suspended if there are too many client requests to a PFS with the SavVol on the same spindles.

A customer needs to move data from a CLARiiON to a new VNX storage system. Attempts to configure a SAN Copy session with Unisphere fail. The customer uses Navisphere Secure CLI to configure the session. The session can be successfully started from Navisphere Secure CLI but fails just prior to completion each time it is started. What is the cause of the failure?

A. Source and target LUN IDs do not match.

B. Source is a standard LUN and the target array has only meta LUNs available.

C. Source LUN is larger than the target LUN.

D. Source LUN is RAID 1/0 and the target LUN is RAID 5.