E20-326 Online Practice Questions and Answers

A customer plans to migrate existing AIX, HP-UX and IBM iSeries hosts to a new VMAX array. Performance data is needed to design the VMAX volumes configuration layout. What host performance data do you request from the customer?

A. IOSTAT, SAR, WRKDSKSTS

B. STP, Perfmon, SMF/CMF

C. IOSTAT, STP, WRKDSKSTS

D. Perfmon, SAR, SMF/CMF

You are proposing a new VMAX array with FAST VP. The customer reports their application needs a small amount of EFD capacity and asks whether 200 GB EFDs or 400 GB EFDs would provide better overall performance. Which drive size do you recommend and why?

A. 400 GB EFDs. They support higher IOPS than 200 GB EFDs.

B. 200 GB EFDs. They support higher I/O density than 400 GB EFDs.

C. 400 GB EFDs. They support higher I/O density than 200 GB EFDs.

D. 200 GB EFDs. They support higher IOPS than 400 GB EFDs.

Refer to the exhibit

What is a characteristic of the proposed configuration recommended by TierAdvisor?

A. It will use 6% less storage capacity than the current configuration

B. It will have 51% better response time than the current configuration

C. It will cost 2% more than the current configuration

D. For compatibility with FAST the tier allocations must add up to more than 100%

A customer wants to protect production data using local and remote replication on a pair of VMAX arrays located 100 km apart. Both VMAX arrays are fully configured with virtually provisioned thin volumes.

The customer has a near zero Recovery Point Objective (RPO) and wants to replicate the production

volumes to the remote array, while maintaining a separate backup copy of the production data on the local

array.

Which replication options do you recommend they implement?

A. TimeFinder/Snap and SRDF/A.

B. TimeFinder/Clone and SRDF/S.

C. TimeFinder/Mirror and SRDF/S.

D. TimeFinder/Clone and SRDF/DM.

You are designing an SRDF/S solution. The workload profile is:

Total I/Os per second = 30000

Write % = 20

Read block size = 4 KB

Write block size = 4 KB

Network bandwidth can be purchased in increments of single OC3 (155 Mb/s) links. Data compression is not in use. How many OC3 links would you recommend?

A. 1

B. 2

C. 3

D. 4

You have been working with a customer on a new SRDF/A design and need to validate the configuration using host data. Which tool do you use?

A. BCSD

B. SymmMerge

C. E-lab Advisor

D. Tier Advisor

A customer plans to aggregate a number of CLARiiONs to a Symmetrix VMAX with FAST VP. Which data collection requirements are recommended for a Tier Advisor analysis?

A. Minimum 5 hour NAR and trace data collection with both NAR and trace data collected at 2 minute intervals.

B. Trace data for 30 minutes each hour of NAR capture.Minimum 8 hour NAR data collection at 10 minute intervals for coarse data analysis.

C. Trace data at 1 minute intervals for detailed peak data capture.Maximum 24 hour NAR and trace capture at default 10 minute intervals to enable peak analysis on a daily basis.

D. Minimum 5 day NAR with default data collection interval of 10 minutes.Partial trace data for 30 minutes each hour of NAR capture.

What is the EMC recommended network quality for SRDF/S over GigE?

A. Less than 0.01% packet loss

B. Less than 0.1% packet loss

C. Less than 0.25% packet loss

D. Less than 1% packet loss

A proposed SRDF/S solution was modeled with BCSD. The model assumed that the source array had two RFs. The RA Utilization chart shows the maximum utilization is at 80%.

How many RFs should be recommended to ensure a successful implementation?

A. 2

B. 3

C. 4

D. 6

You are designing the Symmetrix VMAX architecture for a DAS-to-SAN SQL Server migration. Currently all user databases reside on a single, locally-attached disk enclosure, mounted to "N:\". You have decided on RAID-5 protected 15,000 RPM drives for the new SQL database and RAID-1 for the transaction log.Last week, you configured Perfmon to record the current IOPS load of the databases during the 8-hour business day, Monday through Friday as shown in the exhibit. During an average business day, the transaction log processes 87 GB worth of data.

Following EMC best practices, what is the minimum number of spindles that must be allocated for optimal transaction log performance?

A. 2

B. 4

C. 8

D. 10