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1. A company plans to deploy Symmetrix VMAX arrays in their VMware vSphere environment. The ESXi hosts will be connected to the VMAX arrays over a FC SAN. What VMAX FA port flag must be enabled?
A) SPC2_Protocol_Version
B) VCM_State
C) SCSI_Support
D) Volume_Set_Addressing
2. You are designing a Symmetrix VMAX Virtual Provisioning solution for a VMware vSphere environment. What format does EMC recommend when creating a virtual disk for a Virtual Machine?
A) eagerzeroedthick
B) thin
C) 2gbsparse
D) zeroedthick
3. An existing 2-engine VMAX array has 192 x 450GB 15K Fibre Channel drives in a single Virtual Provisioning pool. Two Linux database hosts are connected to the array and both are running PowerPath.
Host oradb01 is connected to the E0 FA ports on each director and is meeting the customer performance SLA. Host oradb02 is connected to the G0 FA ports on each director - and for the past 3 days this host has been experiencing poor performance during peak activity in the afternoons.
What steps do you take to identify likely bottlenecks?
A) Open a case with EMC Support and upload Oracle Statspack information
B) Run iostat -x in order to compare I/O size and read/write ratio of the two hosts
C) Use SMC to check for Virtual Pool alerts, use SPA to measure drive response times
D) Check the host for queued I/Os, use SPA to examine I/O size and utilization on the G0 FA ports
4. Click on the calculator icon in the upper left corner.
A new storage request is submitted for the production instance of an new application from development. The request is for 3 x 200GB LUNs on a recently purchased VMAX array.
While discussing the request with the application team they mention that performance of their test environment has been poor during load testing on an existing DMX-4 array. You check Performance Manager statistics for the DMX-4 and discover that they are using 3 x 100GB LUNs for testing and they are sometimes reaching Device Write Pending.
What will best avoid the Write Pending issue in production?
A) Allocate 3 x 4-way striped meta devices using 200GB hypers
B) Allocate 3 x 200GB devices and reduce the System Write Pending limit to 70%
C) Allocate 3 x 200GB devices and increase the Device Write Pending limit to 10%
D) Allocate 3 x 4-way striped meta devices using 50GB hypers
5. A customer is implementing Replication Manager to create local clone replicas of their SQL database on their VMAX array. The customer is concerned the RM replica jobs may run for an extended period of time and could cause resource conflicts with other production applications. How can the customer best minimize the impact of the RM replica jobs on the array?
A) Run the replica jobs simultaneously and during peak hours.
B) Stagger the replica jobs and run them during peak hours.
C) Stagger the replica jobs and run them during off-peak hours.
D) Run the replica jobs simultaneously and during off-peak hours.
Solutions:
| Question # 1 Answer: A | Question # 2 Answer: D | Question # 3 Answer: D | Question # 4 Answer: D | Question # 5 Answer: C |
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