E20-880 Online Practice Questions and Answers

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. You have recommended a strategy that involves Replication Manager with native DAG.

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

A. Either active or passive

B. Active only

C. Passive only

D. Neither active nor passive

You are working with a customer to design a VNX for Block solution for their SQL database. They currently have a CX4-480. In the past they have co-located their database and log files. In the new VNX design, the database will be placed in

a FAST VP enabled pool. The transaction logs will be placed on a traditional RAID Group. Your customer needs help determining the number of spindles they need to satisfy the needs of their transaction logs.

You know the following:

Transaction period: 8 hours (business day)

Throughput during transaction period: 240 GB

How many RAID 1/0 15K spindles will the transaction log volume require?

A. 4

B. 8

C. 10

D. 16

A VNX for File administrator is implementing SnapSure for backup staging. The administrator is concerned that this solution might affect the Production File Systems (PFS). You are asked to describe the possible performance impact of SnapSure checkpoints on the PFS.

How would you respond?

A. COFW will affect PFS write performance.

B. PFS read activity is not affected by Checkpoints.

C. COFW will affect PFS read performance.

D. Checkpoints have no performance impact on the PFS.

A VMware v4 customer is considering consolidation of their environment to support their cloud IAAS (Infrastructure as a Service) initiative on VNX storage. They have a number of customers interested in deploying clustered application servers, across many varied application environments, onto this new infrastructure.

What advice would you give your customer to help them formulate their new environment and minimize their administrative overhead?

A. Upgrade to vSphere 5. Deploy standardized VM templates and hardware Version 8.

B. Remain at vSphere 4. Upgrade datastores to VMFS-5 and use EVC.

C. Introduce several vSphere 5 servers. Upgrade all datastores to VMFS-5 and use FT.

D. Remain at vSphere 4. Increase current VM images to support 1 TB of memory and deploy HA.

You are designing a VNX for Block solution for a customer. The application is a high throughput OLTP and will require the use of a volume manager to combine multiple LUNs across multiple SPs. Each of the component LUNs resides on a RAID 5 (4+1) RAID Group. Based on best practices, which volume manager stripe element size would you recommend?

A. 64 KB

B. 128 KB

C. 256 KB

D. 1024 KB

A customer has deployed a legacy application on their VNX storage system that is configured with NL-SAS drives. They are considering adding an application to this array. They have reviewed the analyzer file and told you that the NL-SAS disk queue length is 8.

What advice would you give them?

A. Consider upgrading their disk technology

B. No immediate changes are necessary

C. There is growth capacity for their environment

D. Modify the SCSI command set to optimize the queue utilization

When designing a VNX solution, which metric should be used to measure the time a component is busy servicing requests?

A. Utilization

B. Queue Length

C. Response Time

D. Seek Time

What is the best practice for where SavVol should be located?

A. on a disk pool where FAST Cache is not enabled

B. on a thin LUN

C. on Solid State Drives

D. on a disk pool where FAST Cache is enabled

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

An application generates 800 random 16 kB IOPS with a R/W ratio of 3:1. An MV/A mirror is started on the application LUN. The update cycle is configured to be 15 minutes, and updates take 6 minutes to complete. Assume that the data rate is constant.

What is the minimum space that should be configured for the Reserved LUN Pool on the secondary VNX?

A. 2,813 MB

B. 4,500 MB

C. 5,625 MB

D. 11,250 MB

When designing a SAN Copy migration what is the limitation of a SAN Copy Pull migration?

A. The source LUN is offline during the sync

B. Data can be read only from the destination LUN during the sync

C. CPU usage is higher on the source array

D. An enabler is required to be installed on the source array