EMC EMC Certifications E20-393 Questions & Answers

• Question 261:

  How is encryption set for a Unity storage system?

  A. Clicking the "Mode" checkbox on the Manage Encryption page

  B. Selecting "Status" on the Manage Encryption page

  C. Automatically set at the factory

  D. First time the license is applied

  Correct Answer: D

  D@RE is included by default on Unity arrays and included in the Unity license file unless otherwise requested during ordering. Therefore, all that is needed to activate D@RE is to install the D@RE enabled license file. The license installation process is not specific to D@RE, and is required to be performed before using the array. When logging into Unisphere for the first time, license installation appears as a step of the Unisphere Configuration Wizard, prompting the administrator to install the license file obtained from EMC. If this license file includes D@RE functionality, D@RE will be enabled once the license file is installed successfully

  Note: Unity storage systems address sensitive data concerns through controller-based Data at Rest Encryption (D@RE), which encrypts stored data as it is written to disk. D@RE is a license controlled feature available by default on Unity storage systems, and, being designed to be largely invisible to administrative end users, requires almost no effort to enable or manage. Enabling the feature or backing up the encryption keys externally takes just seconds, and redundant keystore backups stored on array ensure that user data is always as available as it is secure.

• Question 262:

  A system administrator experienced a power failure in their environment. To which device will cache de-stage?

  A. M.2 SSD on each Storage Processor

  B. First four disks in the Disk Processor Enclosure

  C. Cache does not need to de-stage as it is now non-volatile

  D. Backup Battery Unit will keep the data alive in cache

  Correct Answer: A

• Question 263:

  A service provider is installing a Unity storage system for an end-user. The end-user is concerned about network security and will not allow the service provider access to the network.

  How can the service provider set a static IP address for the Unity storage system management interface?

  A. Use the embedded InitCLI tool

  B. Connect directly to the service ports and configure the networking through UEMCLI

  C. Use an IPMI serial over LAN connection

  D. Use the Connection Utility to create a configuration file

  Correct Answer: B

  The svc_initial_config UEMCLI command sets up initial system configuration. It configures a management IP address when the Connection Utility (CU) is not available on the network. If an address is set, this command can also change the management IPv4 and IPv6 configuration mode. It attempts to configure the system with the given friendly name and/or network parameters.

  Note: The Unisphere CLI (UEMCLI) is a tool that provides us with the CLI access to perform the same actions as one would on the Unisphere web interface.

  References: https://www.emc.com/collateral/TechnicalDocument/docu69328.pdf (page 60)

• Question 264:

  A system administrator has added a new Unity storage array to their environment. The administrator wants to migrate block data from vVNX running in their VMware environment to a UnityVSA. In addition, the administrator needs to migrate the block data from an older CLARiiON storage array to the new Unity storage array.

  Which single block migration option will work for both the virtual and hardware storage devices?

  A. SAN Copy Push

  B. VPLEX

  C. Host-Based LVM

  D. RecoverPoint

  Correct Answer: A

  You move Block storage from a CLARiiON CX or VNX Series storage system to an EMC Unity system.

  Note: Clariion (styled CLARiiON) is a discontinued [1] SAN disk array manufactured and sold by EMC Corporation, it occupied the entry-level and mid-range of EMC's SAN disk array products. In 2011, EMC introduced the EMC VNX Series, designed to replace both the Clariion and Celerra products.

  Incorrect Answers:

  D: EMC RecoverPoint protects storage arrays LUNs and provides concurrent local and multiple remote data replication copies with continuous data protection for any PiT Recovery. It supports EMC VMAX 10K, 20K, 40K, VNX, VNXe3200, VNX-F, VPLEX, XtremIO and 3rd party arrays via VPLEX.

• Question 265:

  What is the minimum and maximum recovery point objectives (RPO) configurable when using Unity native asynchronous replication?

  A. Minimum= 5 minutes Maximum= 24 hours

  B. Minimum= 5 minutes Maximum= 48 hours

  C. Minimum= 1 minute Maximum= 24 hours

  D. Minimum= 1 minute Maximum= 48 hours

  Correct Answer: A

  Recovery Point Objective (RPO) is an industry accepted term that indicates the acceptable amount of data, measured in units of time, that may be lost in a failure. When you set up an asynchronous replication session, you can configure automatic synchronization based on the RPO. You can specify an RPO from a minimum of 5 minutes up to a maximum of 1440 minutes (24 hours).

  References: https://www.emc.com/dam/uwaem/documentation/unity-p-replication-config.pdf (page 7)

• Question 266:

  Which step must be completed prior to performing the initial configuration of a UnityVSA system and creating the first storage pool?

  A. Create an ESXi host profile

  B. License the system for NFS and SMB support

  C. Add vDisks to the storage appliance

  D. Install license keys for thin provisioning

  Correct Answer: C

  UNITY VSA STORAGE POOL CREATION

  1.

  Under the Storage Pool Section go to Pools. Select the + to start the "Create Pool Wizard".

  2.

  Name the Pool

  3.

  Assign a Tier to each Virtual Disk attached to the VSA. You have Extreme, Performance and Capacity.

  

  Etc.

  References: https://samshouseblog.com/2016/06/08/unity-vsa-storage-pool-creation/

• Question 267:

  What is the maximum number of LUNs in a Consistency Group?

  A. 25

  B. 50

  C. 75

  D. 100

  Correct Answer: C

  The consistency group (CG) term is used for grouping several LUNs together in order to ensure write-order consistency over several volumes. Each LUN can contain up to 2 TB, and the total supported capacity can be up to 150 TB. References: https://en.wikipedia.org/wiki/RecoverPoint

• Question 268:

  Which migration tool can be used to move file data a Unity storage array in both NFS and CIFS/SMB protocols?

  A. EMC Select Datadobi

  B. Unity Async Replication

  C. rsync

  D. EMCopy

  Correct Answer: D

  EMcopy will work to copy the data from Solaris host to export CIFS and NFS including the security configuration. References: https://it.toolbox.com/question/copy-data-from-nfs-shared-file-systems-to-nfs-and-cifs-101012

• Question 269:

  Which Unity service task is used to reinstall the root operating system while leaving the user's data intact?

  A. Restore the Management server

  B. Reimage the Storage Processor

  C. Restore the Management software

  D. Reinitialize the storage system

  Correct Answer: B

  Re-image a storage processor (SP) to safely fix problems with the system software that could not be resolved by rebooting the SP. Re-imaging analyzes the system software for errors and attempts to correct them instantly. Re-image an SP

  from the Service System page.

  Your configuration settings and stored files will not be changed.

  References: https://community.emc.com/docs/DOC-40315

• Question 270:

  Which FAST Cache operation can be performed from the Settings window?

  A. Disable FAST Cache use on a specific pool

  B. Pause FAST Cache use

  C. Expand FAST Cache

  D. Enable FAST Cache use on a specific pool

  Correct Answer: A