A customer has an EMC VNX with the total efficiency pack. Several applications access the VNX including the company's Exchange 2010 email system. The Exchange log files are on a dedicated RAID 1/0 LUN and the mailbox databases are on a storage pool shared by other applications. What can be done to improve performance in the Exchange environment?
A. Enable FAST Cache on the storage pool
B. Enable FAST VP on the storage pool
C. Enable FAST Cache on the log LUN
D. Enable write-through caching
A customer plans to use MirrorView/A to replicate between two VNXs communicating directly with each other. The VNX are 160 kilometers apart. The customer cannot purchase a dedicated fiber cable between sites or any additional hardware. What protocol should be used between sites?
A. DWDM
B. FCIP
C. iSCSI
D. FCoE
You review a Unisphere Analyzer report from a customer's EMC VNX. You observe that disk read activity
is higher than can be accounted for from host reads and normal pre-fetch activity.
What is the likely cause?
A. Writes on the array are reasonably sequential, but there is not enough data in cache to fill each stripe.
B. Individual writes are being requested and sequenced until the entire stripe is cached and parity is calculated before being written.
C. Disk crossings and stripe crossings are normal events where large I/O is involved.
D. The Unisphere Analyzer report was run against the wrong storage processor.
A customer is running a cluster of ESX v4.x servers accessing a VNX LUN with a very large number of virtual machines. They are experiencing intermittent transaction acknowledgement delays. What would you recommend to the customer to lessen these delays?
A. Upgrade to VMFS-5 and utilize hardware assisted locking
B. Upgrade to vSphere 5 and utilize Block Zeroing
C. Upgrade to VMFS-5 and utilize Full Copy
D. Upgrade to vSphere 5 and utilize Thin Provisioning Stun
A customer recently installed vSphere ESXi 5.0 on a five host cluster attached to an EMC VNX using FCoE. EMC PowerPath/VE with a full license is installed on all hosts in the cluster. What is the default load balancing policy that will be used?
A. Round Robin
B. clar_opt
C. No redirect
D. Least_I/O
A customer plans to migrate their virtualized server environment to a new VNX array. They are concerned their storage pool configuration could be compromised by their varied server workload profiles. What vSphere v5.0 feature would you discuss with the customer to address their concern?
A. Clustered Datastore Affinity
B. Raw Device Mapping
C. Native Multipathing
D. PowerPath/VE
A customer wants to implement file system replication between two EMC VNX. The source production file system contains data from a sequential workload that resides in a pool comprised of 2 TB NL-SAS drives. Due to cost concerns, the destination file system and SavVol volumes will also be NL-SAS and share spindles with user LUNs for another application. What should you tell the customer about this configuration?
A. The configuration goes against EMC best practices because it shares LUNs with user applications.
B. NL-SAS is adequate if the source file system is on NL-SAS and contains a sequential application.
C. When using VNX Replicator, only SAS drives should be used for Replication SavVol Volumes.
D. The destination file system can be used as a source for cascaded replication with no impact to performance.
A storage administrator recently replaced their secondary EMC CLARiiON with a new EMC VNX. The secondary CLARiiON was used to store secondary images of their production LUNs using MirrorView/S.
After the replacement, the storage administrator realizes they fractured the mirrors to the primary CLARiiON, but did not destroy them. The storage administrator reports they are not able to destroy the old mirrors and receives an error message stating the secondary SP cannot be reached.
What is the recommended method to destroy the old mirrors?
A. Enable Engineering Mode and delete the mirrors.
B. Put the original CLARiiON DAEs into the VNX and delete the mirrors.
C. EMC Support must be engaged to delete the mirrors.
D. Use Navisphere Secure CLI to delete the mirrors.
A customer is using SAN Copy to migrate data between two EMC VNX. They use Navisphere Secure CLI to manually select the source and destination LUNs for the SAN Copy session. The source LUN is 419430400 blocks in size, with 367001600 blocks used for data. They select a destination LUN that is 367001600 blocks in size. The SAN Copy session starts, but fails to complete. What is the most likely cause for this SAN Copy session behavior?
A. The source and destination LUNs do not have the same block count.
B. The source LUN is already being replicated to a different destination LUN.
C. The source and destination LUNs are not the same RAID type.
D. The destination LUN needs to have a smaller block count than the source LUN.
A customer has successfully set up a MirrorView/A connection between two VNX arrays. After selecting a traditional LUN as the primary image LUN, the user receives an error when trying to add a secondary thin LUN image. What must the customer do to correct this problem?
A. Add LUNs to the RLP on the secondary array.
B. Create a Secondary Image with a traditional LUN.
C. Add LUNs to the RLP LUN on the primary array.
D. Configure the WIL LUN on both arrays.
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