E20-880 Exam Questions

A Snapshot Source LUN performs 500 random 4 KiB IOPs, with a 4:1 R/W ratio. At what rate is chunk data written into the RLP when the session starts?

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

An Oracle database is stored on an EMC VNX storage array and replicated to a second VNX array at a DR location. EMC RecoverPoint is providing the replication. According to best pra...

A customer has placed their user data, consisting of text, Word, and Excel files, on a thin LUN created from an existing pool. The thin LUN is reaching capacity and cannot be expan...

An application owner is concerned about the performance of a set of application servers. The applications generate a large amount of small I/O. Disk and LUN response times appear t...

A customer has recently virtualized an Oracle database on a VNX system. Initially, performance was satisfactory. Now, with more usage there is some performance degradation. You use...

A customer wants to use Replication Manager (RM) to create local copies of their SQL databases. They want RM jobs to complete as soon as possible without any interruption to the da...

Your customer has recently purchased a VNX to host their three Oracle RAC database environments and automated payment processing application. The RACs and application are different...

You designed the disk layout on a VNX storage system for a large client. They have a very large amount of basic file data consisting of Word documents and text files. The data need...

Your customer wants to expand each back-end bus to the maximum of 10 enclosures attached via an LCC with an edge expander. They are concerned that it will add extra latency. What s...

You are currently investigating a SQL performance issue on a VNX array. You narrow down the RAID group where the log file resides. You find that the disk response time is 12 ms. Ba...

A customer is supporting 800 Exchange users on a VNX5700. The users are divided among four Exchange storage groups using a total of eight LUNs each for data and logs and two LUNs f...

A company needs to create clone LUNs on a VNX storage system. These LUNs will be used by Replication Manager to back up a Microsoft Exchange server database and log LUNs. Where mus...

A storage administrator with a VNX Unified solution is using the CLI to monitor the daily storage performance. They must type long commands to examine the statistical types and nam...

Your customer wants to use a SnapView snapshot as part of their backup strategy. You need to determine whether or not the proposed RLP configuration will meet the performance requi...

You are conducting an analysis of a Celerra system to migrate the data to a new VNX Unified storage system. You want to measure the current connections for the CIFS/NFS protocol. W...

A customer with a VNX for File system has a mix of Windows and Linux clients. The Storage Administrator wants to track and examine different types of correlated statistics for thei...

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...

A VNX storage system is being configured to provide storage for an Exchange 2010 implementation for 2,000 users. iSCSI will be used for connectivity between the servers and the arr...

Your customer has LUNs with a total size of 20,000 GiB. The total I/O load is 15,000 IOPS, with a 4:1 R/W ratio. Analysis of your customer's data indicates that data skew is 90%. R...

A customer has recently implemented Microsoft Exchange 2010 on a VNX storage system that hosts a variety of application servers. The Exchange implementation is currently using RAID...

A customer is using a virtualized environment with a large number of NFS datastores presented from a VNX system. They are experiencing more than expected network traffic on their d...

A customer recently added a large number of new users to their VNX for Block storage system. They now complain that the system is slow. You have been asked to fix this problem. The...

A customer is running a data warehouse server with dual HBAs connected to a SAN. A performance analysis of the server shows high utilization. This server needs to be backed up to a...

A customer has implemented your VNX for File design for a high-performance CAD/CAM application. The design specified several NFS clients, each accessing a single file system in a s...

An application generates 1000 random 16 KiB IOPS with a R/W ratio of 4:1. An asynchronous mirror is started on the application LUN. The update cycle is configured to be 20 minutes,...

During a white board session with your customer you explain the benefit of partition alignment. As an example, you use a 64 K write and explain the difference between a properly al...

Seven users are trying to simultaneously read different parts of the same file from their VNX for File storage system. All parts of the file are located on the same physical disk....

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

Replication Manager (RM) is being used to create replicas for a SQL server installed on VMFS residing on an ESX server. The operations are sent from a separate virtual RM proxy hos...

You are designing a VNX for File implementation for a customer. SnapSure Checkpoints will be used for both backup staging and file restore. The customer would like to place the Sav...

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 cust...

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 exhibi...

Refer to the exhibit. A customer has three SAS DAEs configured with eight 4+1 RAID 5 Groups (RG) and six Hot Spares as shown in the exhibit. All RGs are unused except for RG 0, whi...

Refer to the exhibit. A customer is seeking insight about the data access profile on LUN 500, and has provided you the output shown in the exhibit. The Average Seek Distance (GB) p...

Refer to the exhibit. What can be concluded from the exhibit about the I/O profile of LUN 600?

Refer to the exhibit. A customer has three SAS DAEs configured with eight 4+1 RAID 5 Groups (RG) and six Hot Spares. All RGs are unused except for RG 0, which contains the Control...

Refer to the exhibit. You are proposing a storage solution using VNX to support a Microsoft Exchange 2010 virtual implementation on VMware ESXi. You have worked with the customer t...

Refer to the exhibit. What is true of the I/O access pattern after 16:10?

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

Which function of MCC allows cache to dynamically react to workload changes?

What is the prefetch mode in MCC that triggers a host to read two logical cache pages?

Your customer is migrating from a VNX to a VNX with MCx. Based on their workload, 16 KB constant prefetch sizes were configured on the VNX to improve performance. The customer want...

A VNX block-only customer is requesting a performance evaluation of their array. The storage administrator asks you what files you will need to perform the assessment. The customer...

How many threads should be used to provide the best performance to a sequential file system spanning a single 4+1 RAID 5 LUN?

In designing a disk layout with multiple disk types, which metric should be used for data locality?

A LUN has the following settings: - Prefetch TypE. Variable - Prefetch Multiplier: 4 - Segment Multiplier: 4 - Prefetch DisablE. 4097 - Write-aside SizE. 2048 - Maximum Prefetch: 4...

What size must an I/O exceed for Write Bypass to occur in an EMC VNX with pre-MCx architecture?

What would happen if both watermarks are lowered in a bursty workload environment with EMC VNX?

You are being asked to help a customer that is having issues with their new OLTP application that they have just connected to their existing VNX. The OLTP Administrator has created...