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Q1. An engineer needs to configure a VMware host. According to best practice, the engineer needs to enable a feature by changing the variables QFullSampleSize and QFullThreshold. The engineer sets those two parameters to the value of 0 in VMware ESXi 5.1 Patch 1 and later versions.
Which feature is enabled?
A. Adaptive queue depth
B. Enhanced Transmission Selection (ETS)
C. Asymmetric logical unit access (ALUA)
D. Priority Flow Control (PFC)
Answer: A
Explanation
At times of high congestion, VMware has an adaptive queue depth algorithm that can be enabled with the QFullSampleSize and QFullThreshold variables. These variables aid in relieving the congestion by dynamically reducing and increasing the LUN queue depth. Due to the architecture of SC Series storage, enabling these settings is not recommended unless under the guidance of Dell Copilot Support or Dell Support
Q2. An engineer has recently completed installing a Storage Center. The engineer needs to configure the ability to set which tiers the volume uses for storage.
What should the engineer do to meet the requirements?
A. check“RAID type Used” in the Storage Center settings in EM
B. check “Allow Storage Profile Selection” in the SC settings in EM
C. check “Allow Storage Profile Selection” in the Volume settings in EM
D. check “RAID Type Used” in the Volume settings in EM
Answer: B
Explanation
Referencehttp://en.community.dell.com/techcenter/extras/m/white_papers/20440324/download
Q3. When testing controller failover the customer notices that the IOMeter running on the server paused, then continued running IO without reporting an error. The customer expresses concern to the deployment engineer.
How should the engineer respond to the customer?
A. This is normal behavior because only one server path used when a controller fails.
B. The server multi-pathing software is configured incorrectly.
C. The Fibre Channel (FC) switch zoning is configured incorrectly.
D. This is normal behavior because the system has to move WWNs to different ports.
Answer: B
Q4. An engineer needs to install an SC8000 with four FC ports in each controller and two FC switches set up in a dual fabric. Each controller also has two 10 Gb iSCSI ports. All iSCSI ports are connected to an ethernet switch. The system uses virtual ports.
How many fault domains are required?
A. 3
B. 5
C. 4
D. 2
Answer: C
Q5. A customer has a newly installed storage array. The customer needs to proactively monitor and report storage utilization on a regular basis.
Which customizable, proactive tool should be configured to perform this task?
A. Enterprise Manager Threshold Alerting
B. Dell SupportAssist
C. Storage Center Event Monitoring
D. Enterprise Manager Automated Reporting
Answer: A
Q6. A storage array is configured with four front-end ports on each controller (in a dual-controller configuration) for server connectivity. The storage array runs in Legacy Port mode. An engineer needs to provide multi-pathed (2 fabrics) connectivity from the storage array to the server.
What is the minimum number of fault domains required?
A. 8
B. 2
C. 4
D. 6
Answer: B
Q7. Refer to the exhibit.
Users report that access to their home directories on the Storage Center is performing very slow. This problem started a few minutes ago.
Which tab shown is most useful troubleshoot this issue?
A. Charting
B. Hardware
C. I/O Usage
D. Storage
Answer: C
Explanation
Referencehttps://davidbraasch.files.wordpress.com/2012/12/680-017-017.pdf(page 47)
Q8. A customer has replication configured between its primary and DR sites. When does a customer need to update QoS node settings?
A. A security audit has found a substantial portion of unencrypted traffic between sites.
B. The number of volumes being replicated between sites has doubled.
C. Additional storage capacity was added to the production system.
D. The bandwidth between sites has been upgraded.
Answer: D
Q9. A customer has iSCSI servers that occasionally perform poorly. The performance issues on a particular server occur during temporary traffic spikes to that server. Logs show that the number of dropped packets increases during the traffic spike. In normal traffic conditions, performance is acceptable.
What are iSCSI best practices to fix this problem?
A. make sure that switches used for iSCSI are non-blocking switches
B. disable storm control
C. enablejumbo frames end-to-end
D. enable bi-directional flow control
Answer: D
Q10. Refer to the exhibit.
A technician is performing an SC8000 ISO update to the latest SCOS version. The technician logs into the iDRAC, selects the ISO file, and reboots the controller. The screen appears as shown.
What should be the technician’s next step?
A. Type “Maintenance” and press “Enter” to provide a menu of installation choices.
B. Type “Installer” and press “Enter” to show a Maintenance menu.
C. Type “Setup” and press “Enter” for a menu of update options.
D. Type “Exit” andpress “Enter” to reset the controller and allow access to the Boot Manager menu.
Answer: C
Q11. An engineer is configuring fault domains and front-end IO ports on a dual controller storage array. Any volumes that are later created and mapped to a server must be active/optimized on one controller and standby on the other controller.
Which port mode should the engineer use to meet this requirement?
A. Physical Port Mode
B. Virtual Port Mode
C. Legacy Port Mode
D. ALUA Port Mode
Answer: C
Q12. An engineer needs to use a set of commands to initialize a new SC8000 with serial numbers 12345 & 12346 from the CLI.
Which initial set of commands should the engineer choose?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: C
Q13. A customer has a newly installed storage array. The customer needs to proactively monitor and report storage utilization on a regular basis.
Which customizable, proactive tool should be configured to perform this task?
A. Enterprise Manager Threshold Alerting
B. Dell SupportAssist
C. Storage Center Event Monitoring
D. Enterprise Manager Automated Reporting
Answer: A
Q14. What are two 1 Gb iSCSI best practices to set up and-to-end connectivity (servers, switch, and storage)? (Choose two.)
A. Flow Control
B. Jumbo Frame
C. Spanning Tree
D. Unicast Storm Control
Answer: B C
Explanation
Referencehttp://en.community.dell.com/techcenter/extras/m/white_papers/20437971/download
Q15. How are replay scheduling rules applied to a particular volume?
A. Areplay profile may have multiple schedule rules, but a volume belongs to exactly one replay profile.
B. A replay profile may have multiple schedule rules, and a volume may belong to multiple replay profiles.
C. A replay profile has exactly one schedulerule, but a volume may belong to multiple replay profiles.
D. A replay profile has exactly one schedule rule, and a volume belongs to exactly one replay profile.
Answer: A
Q16. An engineer has installed an SC4020 with four FC ports in each controller. This is a dual-fabric installation with four FC connections in each server. The servers use the OS built-in multi-pathing capabilities.
Which two configurations will cause the controller failover to fail? (Choose two.)
A. Too many volumes are mapped to the server from one controller.
B. The switch zoning is incorrectly configured.
C. The server HBA timeouts are set incorrectly.
D. The multi-pathing software is incorrectly configured.
Answer: C D
Q17. An engineer needs to use a set of commands to initialize a new SC8000 with serial numbers 12345 & 12346 from the CLI.
Which initial set of commands should the engineer choose?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: C