EMC EMC Certifications E20-393 Questions & Answers

• Question 221:

  How long will a Copy Back operation take when a hot spare is invoked?

  A. Pro-Active hot spare does not use a Copy Back operation

  B. Copy Back time depends on the RAID type

  C. Copy Back time depends on the disk capacity

  D. Copy Back time depends on the disk type

  Correct Answer: B

  Note: Starting with Release 24, you can now use a proactive hot spare for proactive disk replacement. Before Release 24 you had to remove the physical disk to replace in order to force a rebuild. During the rebuild phase, the RAID group

  was "degraded" and at risk.

  Resolution:

  Three main benefits of using a proactive hot spare:

  Avoiding "uncorrectable errors" due to media problems during the rebuild process.

  Greatly reduce the risk of having a degraded RAID group, and the risk of having a double-faulted RAID group.

  Performance - a copy to hot spare is faster than a normal rebuild.

  References: https://community.emc.com/docs/DOC-9419

• Question 222:

  A user is having difficulty troubleshooting a Unity storage system and the service provider has been contacted for assistance. The service provider needs to run some service commands on the Storage Processors to troubleshoot the issue further.

  Which step must be taken to allow the service provider remote access to the storage system?

  A. Enable SSH on the storage system

  B. Set the Unisphere preferences to "Optimize" for remote access

  C. Specify the SMTP configuration

  D. Specify the Remote Logging configuration

  Correct Answer: D

  The Service Tasks tab provides tools to service the storage system, including repair and troubleshooting. You can use this page to collect system and configuration information for assisting your service provider with a service request. The

  service password is required to access the various service task operations.

  The Technical Advisories tab displays up-to-date information about advisories specific to the system by referencing knowledge base articles. The Logs tab displays an audit log for system events. It also allows users to configure a remote host

  to which to send log information and lets users export logs into a CSV file for additional reporting purposes.

• Question 223:

  What is one method that is used to verify an ESRS configuration?

  A. Proxy server authentication

  B. RSA authentication

  C. Trigger an SNMP trap test

  D. Send an e-mail verification

  Correct Answer: B

  References: https://www.emc.com/collateral/software/data-sheet/h1948-secure-remote-supp-gateway-ds.pdf

• Question 224:

  A file system is 1 TB in size and contains 250 GB of data. The file system is not fully allocated and only 450 GB of pool storage is in use. The user wants to reduce the file system to 300 GB. How much space is returned to the storage pool?

  A. 150 GB

  B. 450 GB

  C. 700 GB

  D. 750 GB

  Correct Answer: A

• Question 225:

  In order to replace a faulty component, a service provider has placed one of the Unity Storage Processors into Service mode. Once the component is replaced, how is the Storage Processor brought back into Normal mode?

  A. Exit the Service Mode task

  B. Reboot the Storage Processor

  C. Reboot the storage system

  D. Restart the Management software

  Correct Answer: B

  If a single Storage Processor (SP) comes up in Service Mode, in Unisphere, you need to reboot the SP to return it to Normal Mode. References: https://www.emc.com/collateral/TechnicalDocument/docu69355.pdf (page 4)

• Question 226:

  In UnityVSA, which license(s) is able to extend the storage capacity from 25 TB to 50 TB with an upgrade path license?

  A. Professional only

  B. Professional and VVOLS

  C. VVOLS only

  D. Community

  Correct Answer: A

  Professional Edition is a licensed subscription-based offering available at capacity levels of 10 TB, 25 TB, and 50 TB.

  Incorrect Answers:

  B, C: VVOLS is not a license for UnityVSA.

  D: 4 Community license is for 4 TB only. Community Edition is a free downloadable 4TB solution recommended for non-production use. References: https://www.emc.com/collateral/TechnicalDocument/docu69362.pdf (page 3)

• Question 227:

  When defining which resources on the destination system the replicated item will use for an asynchronous session, which settings must be provided?

  A. Replication Mode, RPO, and Replicate To

  B. Name, Pool, and Storage Provisioning

  C. Ethernet Port, Subnet/Prefix Length, and Gateway

  D. Management IP Address, User Name, and Password

  Correct Answer: B

  Create a replication session Ensure that you have first created relevant replication interfaces and connections, and then you need the name, pool, storage provisioning, and tiering policy you want to use for the destination storage resource. The system will automatically created a destination storage resource as part of this process.

  References: https://www.emc.com/dam/uwaem/documentation/unity-p-replication-config.pdf (page 23)

• Question 228:

  When a storage resource has a snapshot taken of it, where are writes to the storage resource written?

  A. New space allocated from the storage resource parent pool

  B. New space allocated in 256 MB stripes from FAST Cache

  C. Existing space of the storage resource

  D. Existing space from the Reserves LUN Pool

  Correct Answer: A

• Question 229:

  When the LUN Snapshot Attach to Host operation is performed, what does the Unity system optionally do before beginning the attach process?

  A. Creates a snapshot of the LUN

  B. Detaches the host from the snapshots of any other LUN

  C. Creates a copy of the snapshot

  D. Deletes all other existing snapshots of the LUN

  Correct Answer: B

• Question 230:

  Which Directory Services can be configured in the Unisphere Settings window?

  A. LDAP

  B. NIS

  C. NDS

  D. Active Directory

  Correct Answer: A