A customer is experiencing performance degradation when accessing certain CIFS shares
configured on a VNX for File storage system. To troubleshoot, they would like to create a
report that shows a combination of CIFS and network data.
What command would you recommend that they use?

Your customer has a 2,000 GiB traditional LUN containing a database of customer
information. Data belonging to active customers is frequently accessed, but the majority of
the data is static and seldom used. Your customer wants to implement block compression on
the LUN.
What should your customer be made aware of?

A customer has implemented a VNX array that hosts multiple SQL database applications,
but there are significant performance issues with some of the applications. They have
purchased a small number of Flash drives and have asked for your recommendation on
maximizing performance using the limited number of new drives. What suggestion would you
make about using the Flash drives?

A customer is designing an environment that utilizes thin LUNs on a pool. The customer
makes capacity calculations before they create the thin LUNs, and determine that three thin
LUNs are required. After the customer creates them they experience a capacity shortage.
How much overhead should the customer have calculated into the usable capacity for each
thin LUN?

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 crash-consistent 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?