A customer has a mix of Windows 2003 and Windows 2008 virtualized guests deployed in their
vSphere v4 environment. They have purchased a new VNX array and are also upgrading their
ESX servers from V4.0 to V5.0.
Their VMware administrators are creating the new target LUNs and VMFS file systems for their
datastores. They have noticed that the alignment offset on the new array is not the same as their
old array, so they are concerned about disk crossing on the new array.
How would you respond to the customer?

A customer has deployed various applications on a VNX storage system.
During a performance analysis, you notice several hot spots on different drives and enclosures.
Upon further investigation you discover that all storage system ports are in use, and that all ports
are supporting the same number of enclosures and disk drives.
What will you recommend to your customer?

You have designed an Auto-tiering solution using Flash, SAS, and NL-SAS disks in your storage
pool. Your design was implemented and scheduling has been running daily. The customer reports
that there is no data in the Flash drive tier.
Why is this the case?

A customer has a VNX system to provide storage for a VMware 4.1 Cluster with four ESX hosts.
The ESX hosts are running Exchange servers and other application servers. The customer is
using a virtual machine as a Replication Manager. A VMware proxy host is used to get crashconsistent replicas for the Exchange mail stores.
Which volume access type is recommended for the Exchange servers?

A customer has deployed a new application on a host using VNX storage. The new application I/O
size is 512 KiB, has a 50/50 read-write ratio, and its write behavior is sequential and bursty. All

other host applications are characterized by 4 KiB I/O random writes.
The customer has noticed degraded overall VNX performance during write bursts, which is caused
by the new application. Your analysis reveals a high rate of forced flushing, as well as significant
CMI congestion.
What can you recommend to improve overall VNX performance?

An application generates 500 random 8 KiB IOPS with a R/W ratio of 3:1. An asynchronous mirror
is started on the application LUN. The update cycle is configured to be 30 minutes, and updates
take 15 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?

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. The
customer wants a strategy that involves Replication Manager and DAG with third-party replication

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

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 5
(4+1) and uses FAST Cache for the database volumes, but is not using FAST VP. Performance
has been significantly diminished.
What would you recommend to the customer?

A clone source LUN is 512 GiB in size. It performs 500 random 8 KiB IOPs with a 3:1 R/W ratio.
As part of ongoing testing, the clone is fractured for 10 minutes and then resynchronized. The
testing is performed every hour.
How much data (to the nearest GiB) is read from the source LUN as part of the resynchronization
process?

A customer with an existing VNX for File implementation wants to enable deduplication on a file
system, based on the following specifications:
Idle File System
Number of files: 1 M
Average filesize:50 KiB
Estimated deduplication: 30%
What is the estimated time for initial deduplication?