A company is using SnapView to take snapshots of production data LUNs. The source LUNs are
on a 4+1 RAID 5 group using SAS disks. The reserve LUN pool is on a different 4+1 RAID 5 group
using SAS disks. The average size of the source LUNs is 100 GB and the reserve LUNs have
been sized at 20% or 20 GB each. The administrator has created one reserve LUN per source
LUN.
The company is experiencing performance issues on the snapshots that are not observed on the
source LUNs. What could be done to enhance the performance of the source LUNs and the
snapshots?

A customer has been testing the migration process from a Microsoft Windows server to a new
VNX. They found that performance, security, access, and the EMCopy migration process all

perform well within acceptable limits.
When the customer begins to use the VNX for production, they remove the test configuration and
create new file systems. In addition, they enable deduplication, replication, and rerun the same
EMCopy scripts as were used during the testing. Within a few hours, they notice that the copy rate
is almost half of what they observed during testing to the stand alone system. Migration is likely to
exceed their cut-over window.
How can the customer restore performance to the previous levels?

A new VNX customer started to use a VNX file system as a target for their backup-to-disk system.
This is then replicated using VNX Replicator to an off-site image with a max-time-out-of-sync value
of 5 minutes. The customer noticed that the overall time to backup has increased from 2 hours to
greater than 3 hours. This has occurred since moving to the VNX from their old Microsoft Windows
system.
How can they increase performance to the same or better than the previous system?

A RecoverPoint consistency group journal is initially configured from four separate LUNs: 2 x 70

GiB and 2 x 80 GiB.
What is the resultant journal composition?

You have been contacted to help a company troubleshoot performance issues in their
RecoverPoint environment. You discover their source LUNs reside on 14+2 RAID 6 SAS groups
and their journal volumes reside on a 4+4 RAID 1/0 NL-SAS group. The consistency groups
continually shift into a high load state and are frequently unable to replicate.
What will resolve this issue?

An EMC customer deployed their business critical applications on large AIX servers and VNX
arrays. They are constructing a disaster recovery site 500 kilometers from their primary data
center. The data center manager asked which EMC and Oracle features and products can be
combined to provide block remote protection. Which EMC and Oracle features and products can
be combined?

A customer has two data centers located 500 kilometers apart and uses VNX arrays exclusively
for block data storage in both of them. Each data center is monitored and managed by Unisphere.
The customer wants to deploy an integrated replication methodology to protect his most critical
data. Which product will meet the customer’s requirements?

A study is being conducted to determine the proper network characteristics for two data centers
located 500 kilometers apart. Average incoming I/O – MB/s [24 hrs/7 days/30days] – has been
characterized, but the data compressibility rate must be estimated. Which values should be used
for a minimum/maximum calculation?

A customer has two data centers located 500 kilometers apart and uses VNX arrays in each data

center for both block and file storage. Each data center is monitored and managed by Unisphere.
The customer wants to deploy an integrated replication methodology to protect all of his data.
Which product will meet the customer’s requirements?

A customer plans to use MirrorView/S as their DR solution. They have 10 TB of data to protect,
and are concerned about the performance impact of MirrorView/S on their production data. Their
application generates 8 kB I/Os which are 25% writes, and 256 kB I/Os which are 95% reads.
They are also concerned about the consequences of an accidental fracture on their environment.
How should they configure their data LUNs?