PRACTICE QUESTIONS Flashcards
An architect is configuring BCSD to design SRDF/S between two new PowerMax arrays. The architect
has completed the tasks for the local side of the solution, including RA Port Group, Replication
Group, and site switch.
What is the correct order of steps the architect needs to take to complete the SRDF setup?
configure network circuit
configure remote site switch
create remote array
create remote replication group
create remote RA group
When implementing SRDF/Metro with Array Witness, what is a requirement of the witness array?
Empty RDF group from witness to source and target
The Reserved Capacity for a Storage Resource Pool (SRP) on a VMAX All Flash array is set to 15%. A
TimeFinder SnapVX snapshot is created for a Storage Group containing 10 devices. An application is
actively performing read and write I/O to these devices. Allocation for the SRP reaches 85%.
What happens to the snapshot?
Snapshot terminates
An SRDF/A solution with BCSD is designed and the results are shown in the exhibit. A customer
requirement was a five-minute RPO. In the exhibit shown, the RPO is above the customer
requirement.
How can the five-minute RPO requirement be met?
provide more bandwidth
At a disaster planning meeting, an architect is presented with the following facts by a client:
A Unix host is replicating storage from a Production PowerMax to a VMAX 250FX.
RDF pairs have been split with Production and DR hosts accessing their respective storage.
Invalid tracks have started to build against PowerMax and VMAX 250FX.
The client now wants to bring production back to PowerMax, discarding the VMAX 250FX updates
while keeping the updates on the PowerMax. What is the correct action to take?
Failback
A storage architect is evaluating the performance of a PowerMax array during business hours. They
want to know how much extra load the PowerMax can handle without significant performance
degradation. The Workload Planner is used to identify the hot spots during the recurring backup
windows.
Between 9:30 PM and 1:30 AM and between 3:15 AM and 5:30 AM, backups are causing the
PowerMax to exceed the best practice recommendation. The Recurring System Data Exclusion
Periods chart is used to filter out these hot spots. After running this workload planning for a few
weeks, they notice that the selection of records they previously made are showing different numbers
than when they started viewing the report, several weeks ago.
What is the explanation for this behavior?
- After two weeks the data of each time slot is refreshed with new data
A storage administrator has completed TimeFinder SnapVX testing. The administrator is unable to terminate the TimeFinder SnapVX snapshot of the test Storage Group.
What advice should be provided to the administrator?
Check for linked targets
A storage administrator wants to verify the state of the SLO compliance application data hosted on a VMAX3. Where can the information be found in Unisphere for VMAX?
Storage Group Dashboard
When data consistency is not a requirement, which SRDF mode is preferred when replicating large volumes of data?
SRDF/DM
A TimeFinder SnapVX snapshot of source volumes has been linked to target volumes. The target volumes are being used for application testing.
What is recommended prior to a relink operation?
Continue accessing the source volumes; stop accessing the target volumes
What can administrators manage on a PowerMax using VSI?
capacity utilization
When adding device pairs to an SRDF/Metro configuration using the -exempt option what prevents a device pair from being added?
R2 device is larger than R1 device
A VMWare administrator has been tasked with managing storage for an ESXi cluster connected to a PowerMax array. The administrator is not familiar with Unisphere for PowerMax and wants to use the VMWare Web Client to provision RDM volumes to virtual machines.
Which Dell EMC product provides this functionality?
VSI
What are the legacy SRDF/A sessions?
Capture, Transmit, Receive, Apply
Which Unisphere for PowerMax feature can a storage administrator use when provisioning new workloads on a PowerMax to maintain a certain Service Level?
Headroom Indicator
A Storage architect is evaluating the performance of a PowerMax array during office hours. They want to know how much extra load the PowerMax can handle without significant performance degradation. The workload planner is used to identify the nightly hot spots during the backup window.
Between 11PM and 1AM and between 3AM and 5AM, backups are causing the PowerMax to exceed the best practice recommendation. The One-Time System Data Exclusion is used to filter out theres hot spots. After running this Workload Planning for some time they notice that the selection of windows they previously made are gone.
What is the explanation for this behavior?
One-Time System Data Exclusion only displays the last two weeks of performance data
When sizing a PowerMax solution, what does comfort zone analysis designate?
IOPS at which the disk can provide the most sustained response time
During performance data collection for a PowerMax array, an administrator makes changes to the daemon_options files. Which daemon must be stopped and restarted for the changes to take effect?
storstpd
A storage architect is designing a PowerMax solution. The architect must plan for the external management software deployment to use the minimum required number of hosts.
Which type of Unisphere deployment would fulfill the design requirements?
local configuration
A storage architect is demonstrating to a customer how they can use Unisphere to monitor the array efficiency. Which performance view can be used to achieve the task?
Dashboard
A storage architect is planning the security requirements for a Unisphere installation. They need to determine the default ports used for HTTPS and DB.
Which ports are required?
8443,3324
A new customer is looking to see if their storage groups on the PowerMax array are meeting expectations on response time. Where in the Unisphere for PowerMax user interface would they go to check this?
Dashboard > SG Compliance
T1 The SecurityAdmin for Unisphere wants to add a new user to perform all operations on a storage system, including security operations, and all StorageAdmin and Monitor operations.
What role needs to be assigned to new user?
Admin
With Unisphere for PowerMax, what must be done to collect performance data?
Select array and register it for data collection
What is the max size of a BTP file in Sizer?
300MB
What system comes w/ a KVM in System Bay?
VMAX 950F
What does the -d flag stand for?
device
What is true about SRDF Metro?
device can’t simultaneously be R/W on RDF link on Metro RDF mirror and the target of dat acopy from non-metro RDF mirror
What is the output depicted?
SAR
What flag prevents SAN failure?
donor update flag
What must you keep in mind about VMAX 950F?
only one cache size on all bricks
What is required to disassociate from FA emulation?
ports must be offline that are associated w/ emulation
What is VSI used for?
storage provisioning, storage mapping, managing data protection, capacity utilization
What happens if BCSD patch doesn’t match?
OS patches not updated
What happens if you keep the existing ESXi signature?
can’t increase data store size
What is a quick representation of performance metrics?
noisy neighbor
What is the HYPERMAX version for copy vs no copy?
810.184
What is the overall efficiency ratio?
(subscribed total + snapshot total) / user used
What is the OR ceiling value command?
symquos
How many front end ports on PMax 2000?
64
BCSD steps
verify server list
identify servers for replication
identify 3-5 day plan
verify OS
run collection and verify output matches
run scheduled CRON collection
What is a SUN file output in BCSD?
IOSTAT
What mainframe add-on is used w/ consistency groups?
AutoSwap
