You are reviewing a NAR file and notice that a LUN has a write cache hit ratio of 0.0.
How can you tell if write cache is enabled for the LUN?

Your customer is designing a newly purchased VNX with 30 NL-SAS drives. The customer’s
requirements in order of priority are 1) data availability and 2) performance.
What RAID type do you recommend?

During a customer data gathering meeting, a discussion about applications was presented. Most
of the applications will best be suited for a RAID 5 pool on the VNX. However, one of the
applications has an I/O requirement for RAID 1/0 spindles.
How should the RAID 1/0 application requirement be handled?

Several Windows Server 2008 and RedHat Linux 5.5 servers are attached to VNX storage arrays.
PowerPath version 5.5 was installed on all Windows servers but not on any of the Linux servers.
Linux servers are using native MPIO for path failover. What are the required failover modes for
Windows Server 2008 and RedHat Linux 5.5 servers?

Several Windows servers are allocated storage from the VNX array. The customer would like to
know whether any of these servers are subject to disk crossing.
What tools are available to verify this condition?

Your customer wants to add Flash drives to their VNX array and use them as FAST Cache. They
have specified that they want at least 150 GB of actual FAST Cache capacity on each SP. There
are no Flash drives in the array and they want to follow EMC best practices on hot spares.
How can this be achieved?

Your customer has recently purchased nine VNX arrays. They would like to utilize their current
single Tier 2 backup server to back up the Tier 2 LUNs on all nine arrays, and would like to remain
aligned with EMC best practices.
What is your recommendation?

Click on the calculator icon in the upper left-hand corner. A customer has four (4) LUNs of 500 GiB
each, six (6) LUNs of 250 GiB each, and five (5) LUNs of 100 GiB each. All the drives presently in
their VNX system are SAS and NL-SAS. They wish to implement FAST Cache. Your data
collection shows the skew to be 95%. What is the minimum size of FAST Cache recommended for
this environment?

Click on the calculator icon in the upper left-hand corner. A customer has 6 LUNs of 500 GiB each,

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6 LUNs of 250 GiB each, and 15 LUNs of 100 GiB each. All the drives presently in their VNX
system are SAS and NL-SAS. They wish to implement FAST Cache. Your data collection shows
the skew to be 94%. What is the minimum recommended size of FAST Cache for this
environment?

Click on the calculator icon in the upper left-hand corner. A customer has a heterogeneous pool
with the following configuration:
1000 GiB of Flash, with 400 GiB free
10,000 GiB of SAS, with 2,000 GiB free
80,000 GiB of NL-SAS, with 20,000 GiB free
The customer creates a new LUN with data placement policy set to “auto-tiering”. The LUN is then
populated it with 500 GiB of data. How will that data be distributed (numbers are approximate)?