E20-880 Exam Questions

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 ti...

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

A customer has implemented MirrorView/A. What determines the upper limits for MV/A performance?

A customer is attempting to connect a new VNX array to an existing, redundant FC fabric. Each FC fabric consists of a Cisco MDS9513 switch connected to an MDS9148 switch. The VNX s...

When using the provisioning wizard, how many RAID group options are available?

A customer has a fragmented RAID group. The customer asks you what setting to select to defragment the RAID group as quickly as possible. What do you recommend?

What is the maximum combined host target queue depth that can be accepted on a VNX SP port before a QFULL condition occurs?

Your customer is interested in deploying XtremeSF and XtremeSW together on multiple hosts that will be attached to their new VNX. What would you discuss with your customer?

A customer decides to oversubscribe a switch port group to optimize switch usage. What factors need to be considered?

A customer needs a RAID configuration that can maintain 500 host IOPs. The workload has a profile of 90% reads and 10% writes. The customer is also trying to reduce the amount of d...

A Customer needs a RAID configuration that can maintain 650 host IOPs. The workload has a profile of 90% reads and 10% writes. The customer is also trying to reduce the amount of d...

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...

You are conducting an analysis of a Celerra system to migrate the data to a new VNX Unified storage system. You want to collect statistical information about CIFS file system activ...

A customer has a mix of Windows and Linux clients accessing file systems on a VNX for File system. The Storage Administrator wants to track and examine different types of correlate...

A customer is implementing a VNX for File solution in a performance-oriented application environment. There are Windows and Linux VM clients accessing the file systems. The custome...

The customer wants to display File System statistics data in Unisphere. What is the default polling interval (Minutes) for Statistics Logging?

The customer wants to display storage-system statistics in Unisphere. What is the default polling interval (Minutes) for Statistics Logging?

Your customer is taking over administration of a VNX and is looking over the performance reporting capabilities. While looking at the Analyzer Performance Summary Chart, the custom...

Your customer is new to Unisphere Analyzer and wants to know which chart should be used to get a very simple, at-a-glance overview of LUNs being used by their Oracle application. W...

Your customer is new to Unisphere Analyzer and wants to know which chart should be used to identify how SP utilization relates to the increased IO on LUNs being used their Oracle a...

In helping to configure the storage for a VDI environment, where are thickly provisioned desktops a best practice?

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...

Refer to the exhibit. A large IO spans multiple disks, and 2 stripes. How will the stripe crossing counter and the disk crossing counter increase?

Refer to the exhibit. A single small IO spans 2 physical disks. What will the disk crossing counter increase by?

Refer to the exhibit. A pre-MCx VNX has three SAS DAEs configured with eight 4+1 RAID 5 Groups and six Hot Spares as shown in the exhibit. All RGs are unused except for RG 0, which...

Refer to the exhibit. A customer starts a test running on a thick LUN. The test generates random 4 kB I/Os with a R/W ratio of 2:1. A VNX Snapshot is started on the thick LUN at 09...

A VNX Administrator is analyzing storage workload distribution. The administrator is trying to determine if the array has an acceptable skew. Based on the workload in the illustrat...

Refer to the exhibit. Which process is illustrated in the exhibit?

A customer is in the design phase of their SQL server implementation. They request your guidance concerning the number of disk drives needed to properly configure the database for...

Refer to the exhibit. A VNX Snapshot is started on a Thick LUN at 09:37. The customer wishes to know why throughput drops immediately after the VNX Snapshot starts. What is your ex...

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 cu...

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). Base...

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 syste...

Refer to the Exhibit. VNX SAN Administrator is checking the load on the array. The administrator is trying to determine if this is an acceptable range (between 7130 and 7740). Base...

A company has added a large number of users to a VMware VDI deployment. The users are complaining that the system (VNX-Block) is slow, especially when they start their shift. You h...

Refer to the exhibit. A VNX administrator is analyzing storage workload distribution. The administrator wants to know if the array has an acceptable skew. Based on the workload in...

Your customer has a new VNX solution configured with Flash, SAS, and NL-SAS drives. The customer requires their OLTP, VDI, Software Development, and Regulatory Compliance workloads...

A customer is in the design phase of their SQL server implementation. They request your guidance concerning the number of disk drives needed to properly configure the database for...

A customer has designed an environment using block based LUNs presented to individual hosts. They have configured a pool to start using both thick and thin LUNs. One of the standal...

A customer is checking a NAR file in Unisphere Analyzer. They see that a RAID Group with only a single LUN is shown with consistently large Disk - Average Seek Distances. What coul...

A SQL Data Warehouse database is replicating between two VNX storage systems with Incremental San Copy. The production database is on 15, 15k rpm SAS drives and the Reserved LUN Po...

A Customer is creating a new configuration which requires a ratio of 10% reads and 90% writes. The configuration will also need to handle very small I/O sizes. The customer is also...

A customer is creating a new configuration that has 100% sequential reads with very high thread counts. The configuration will be for a test bed which will require no high availabi...

Click the calculator icon in the upper left-hand corner. An application generates 1000 IOPS with a read/write ratio of 3:1. What is the difference in disk IOPS between RAID 1/0 and...

Which naviseccli performance counter is used to view stripe boundary crossing statistics?

Refer to the Exhibit. A VNX Administrator is monitoring the workload and is considering adding a few flash drives. Based on the workload shown in the illustration, what would be th...

In reviewing a nar analysis, what does workload skew measure?

If the workload graph shows that most of the Storage Processor load is used to support a small amount of data, what could cause this utilization?

Your customer is having performance problems on their Linux database servers that are attached to a VNX. You have diagnosed the VNX and found no obvious issues. Which utility would...

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 fi...