E20-880 Online Practice Questions and Answers

You are migrating a backup application that runs on physical servers to a VDC. The VDC storage is currently a VNX configured with NL-SAS drives only. Your customer is concerned about the cost to achieve reasonable performance. You are designing the VMs that will support the application.

Based on cost, which would be the first solution you would recommend?

A. VMware Paravirtual SCSI virtual adapter

B. Virtual adapter is BusLogic Parallel

C. FAST VP Pool (Flash and SAS drives)

D. SAS RAID Group

A company recently purchased a VNX storage system to support its clustered SQL Server environment. You are designing the disk layout.

Based on EMC best practices, what design characteristics should you follow when configuring SQL Server on the VNX?

A. Basic disks, NTFS volumes of 64 KB clusters

B. Basic disks, NTFS volumes of 128 KB clusters

C. Dynamic disks, NTFS volumes of 64 KB clusters

D. Dynamic disks, NTFS volumes of 128 KB clusters

A customer is concerned about the VNX Unified storage performance. The VNX provides storage services for variety of Windows and UNIX application servers. When monitoring the switches they notice heavy traffic between the servers and the storage.

The LUN analysis yields the following results: $ /nas/sbin/naviseccli -h spa getdisk 1_0_4 -rds -wrts -bytrd -bytwrt Bus 1 Enclosure 0 Disk 4 Read Requests: 478651 Write Requests: 202813 Kbytes Read: 47457840 Kbytes Written: 6449720

What is the I/O size being used to send data to disk?

A. 8 KB

B. 12 KB

C. 16 KB

D. 32 KB

Your customer wants to enable file deduplication on an existing data-populated VNX for File system, based on the following specifications:

Moderately busy file system scan rate: 500 files per second

Moderately busy file system ingest scan rate: 5 MB/sec

Number of files: 1 M

Average file size: 50 KiB

Estimated deduplication: 30%

How long will the initial deduplication take to complete?

A. 25 min

B. 42 min

C. 82 min

D. 116 min

Which tool provides recommendations on how query processing performance can be improved by modifying physical design structures such as indexes, indexed views, and partitioning?

A. Tuning Advisor

B. Query Editor

C. SQL Activity Monitor

D. Performance Monitor

Refer to the exhibit,

You are proposing a storage solution using VNX to support a Microsoft Exchange 2010 virtual implementation on Microsoft Hyper-V. You have worked with the customer to understand the Exchange requirements, which are described in the exhibit. Based on availability, performance, and Exchange mailbox size requirements, you are recommending RAID 5 with 7.2K rpm NL/SAS disks.

Following EMC best practices, what is the minimum number of spindles required for this environment?

A. 14

B. 18

C. 27

D. 37

What is the main reason MirrorView/S has a lower effect on CPU utilization compared to MirrorView/A?

A. No CoFW activity

B. Low CoFW activity

C. High transfer rates

D. Low transfer rates

You have to architect a block migration to a VNX for a customer. Which attribute of incremental SAN Copy for this migration would allow you to migrate the LUNs with minimal down time?

A. The source LUN can be online during the sync

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

C. CPU usage is lower on the source array

D. No enabler is required to be installed

A Customer is creating a new configuration which requires a ratio of 90% reads and 10% writes. The configuration will also need to handle very large I/O sizes. The customer is also concerned about cost and availability of the data. What RAID configuration would meet the customer's requirements?

A. RAID 6 with NL-SAS Drives

B. RAID 5 with SAS Drives

C. RAID 1/0 with SAS Drives

D. RAID 6 with SSD Drives

Refer to the Exhibit.

An administrator is checking the load on the array. The administrator is trying to determine if this is an acceptable range (between 8370 and 8990 IOPs). Based on the illustration, what can you conclude?

A. The array is being saturated

B. The array is at moderate operation

C. The array's load is light, with low response.

D. The array is in acceptable range