You received a call from a customer asking to help troubleshoot why they cannot select
dvols using MVM from their remaining pool LUNS to create a stripe volume.
What could be a reason for this?

A customer 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 single-threaded manner. You need to guarantee that each file system resides on an
exclusive LUN set. Which value would you change?

Your customer has an application on VNX File storage. The customer allocated the storage
using Manual Volume Management in order to achieve the best performance. The customer
noted that the file system used up all of the storage from the File LUNs even though the size
of the file system is much less than the total of the File LUNs used. Why was all of the
storage used when the file system was created?

You have a VNX customer who is concerned that you created multiple LUNs within the same
Flash drive RAID group and believes this will create disk contention with reduced
performance.
What is the reason to create the Flash drive LUNs in this manner?

You are migrating a database on NFS to a new VNX. The customer notes that you have
designated only SAS drives for the database transaction logs and not any Flash drives. The
customer believes that the Flash drives will greatly increase transaction log performance.
What is the reason that you chose SAS drives?

You received a call from a customer asking to help troubleshoot why AVM cannot select
dvols from their remaining classic LUNS to create a stripe volume.
What could be a reason for this?

In VNX with MCx, if the Block compression rate is set to high, what is the initial compression
bandwidth?

A customer created a Thin LUN, enabled compression on a Pool, and installed their email
application environment. The application is showing poor performance. Which workload
characteristic of the application would produce poor access times on a compressed LUN?

A customer needs to reclaim space and has decided to enable compression on a Thick LUN
in their environment.
What happens to the LUN when it becomes compressed?

During decompression with default settings, if the pool becomes too full, decompression will
be paused but host I/O can continue. At what percent full will host I/O be terminated to the
LUN?