Dell EMC DEE-1111 Exam Questions

In an SRDF/Metro Smart DR configuration, the Fault-Aware Witness gives a higher priority to Bias when selecting the winning array.The bias settings for the devices are used to determine the preferred winner in the event of a failure2.The preferred winner is the side that has priority when requesting the lock from the witness instance2.Reference:Dell EMC PowerMax and VMAX All Flash: SRDF/Metro Overview and Best Practices

The NDM Updates feature should be used to complete the migration and address the client's concern. The NDM Updates feature is designed to help automate the process of moving applications across arrays requiring a short application downtime.It allows application migration from a VMAX (5876) array to a VMAX3 (5977), VMAX All Flash (5978), or PowerMax (5978) array1.It supports pre-sync data between arrays and then schedule downtime to do the cutover1.Reference:Dell EMC PowerMax and VMAX: Non-Disruptive Migration Best Practices and Operational Guide

A company plans to implement SRDF/Star, which is a three-site replication solution that provides continuous data protection and disaster recovery capabilities. It is currently using SRDF/S between their two data centers, which are located within 200 kilometers and use synchronous replication. It is setting up a third data center and wants to have at least two identical copies of its data in case of a primary site failure. The third site can be located anywhere in the world and use asynchronous replication. The condition that is needed for the connection between the first two sites and the third site is that the link must be able to transport the delta set of the Recovery Point Objective (RPO) within the company's Recovery Time Objective (RTO). The delta set is the amount of data that has changed since the last successful replication cycle. The RPO is the maximum acceptable amount of data loss measured in time. The RTO is the maximum acceptable amount of time to restore normal operations after a disaster. The link must have enough bandwidth and latency to ensure that the delta set can be transferred within the RTO without exceeding the RPO.

SRDF Star software uses and best practices

SRDF/STAR

Remote replication using SRDF

The most likely cause of this behavior is QFULL responses of the FA ports. When additional hosts are zoned to certain front-end adapters, the FA ports may not be able to handle the increased I/O requests, resulting in QFULL responses. This can cause non-linear variations in throughput and sometimes a drop in throughput of more than 20%.Reference:Dell EMC PowerMax: Service Levels for PowerMaxOS

When expanding the capacity of a three-brick PowerMax 8000 running PowerMaxOS 5978.444.444 configured with Flash Drives RAID 5 (7+1) with SCM drives, the minimum supported configuration is 1x RAID 5 (7+1) added to each brick.This ensures that each brick has additional capacity and maintains the balance of storage across all bricks2.Reference:Dell EMC PowerMax Family Product Guide PowerMaxOS,Dell PowerMax Family Site Planning Guide PowerMax 2000 and PowerMax 8000,POWERMAX FAMILY PowerMax 2000 and 8000 - Dell Technologies Partner Portal