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EMC E20-585 問題練習

Specialist - Systems Administrator, Data Domain Exam 試験

最新更新時間: 2019/07/07,合計19問。

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Question No : 1
A Dell EMC Data Domain administrator wants to delegate some Data Domain operations to the Monitoring and Control Team. The administrator wants the team to check the health of the Data Domain system every morning before 10 am. The administrator wants to add a user specifically for the Monitoring and Control team. The user would be restricted to checking the health of the Data Domain system.
Which role needs to be applied to the new user?

正解:
Explanation:
The user role can monitor the system, change their own password,and view system status. The user role cannot change the system configuration.

Question No : 2
In a Dell EMC Data Domain CIFS backup environment, the following error message is used: “Write failure in writing to client xxx, Error connection reset by peer”.
Which action could resolve the issue?

正解:
Explanation:
Windows 2008 Session Timeout Parameters
SYMPTOMS
CIFS request timeout messages in log/debug/cifs/clients.log:
write_data: write failure in writing to client 1.2.3.4. Error Connection reset by peer
Error writing 61503 bytes to clientfor cmd 0x2e mid 0x4c58. -1. (Connection reset by peer)
Failed to send SMB: cmd 46 mid 19544
APPLIES TO: All Data Domain systems, All Software Releases
SOLUTION
Increase the CIFS request timeout on the client (Windows 2008 server) by changing the registry parameters under the key HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\LanmanWorkStation\Parameters.
References:
https://community.emc.com/docs/DOC-30144

Question No : 3
Which technique is used to identify the duplicate segments in the SISL process used by Dell EMC Data Domain?

正解:
Explanation:
The summary vector and segment locality techniques identify 99% of the duplicate segments in RAM (Inline) before storing to disk.
References:
https://www.emc.com/collateral/hardware/white-papers/h7221-data-domain-sisl-sclg-arch-wp.pdf

Question No : 4
A backup administrator has configured multiple data movement policies on their Dell EMC Data Domain system that is configured with Extended Retention. They want to remove expired data from the retention tier.
Which feature is used to complete the task?

正解:

Question No : 5
DRAG DROP
What is the correct sequence of steps within the Dell EMC Data Domain SISL process?



正解:


Explanation:https://www.emc.com/collateral/hardware/white-papers/h7221-data-domain-sisl-sclg-arch-wp.pdf

Question No : 6
What is a recommended best practice when implementing the Dell EMC Data Domain VTL feature?

正解:
Explanation:
Configure VTL access group and bind the initiator and target.
Discover and configure VTL on the hosts
Etc.
Note: VTL - Virtual Tape Library.

Question No : 7
A backup administrator has enabled the Retention Lock feature on a Dell EMC Data Domain system. They notice increased file system utilization over time and upon investigation they discover the expired files are still present on the Data Domain system.
What could be the possible reason for this situation?

正解:

Question No : 8
What is a consideration of encryption with Dell EMC Data Domain Cloud Tier?

正解:
Explanation:
With DD Encryption, data in the cloud remains secure.

Question No : 9



Based on the exhibit, when monitoring the system show performance command output, the State column has “D” for each line entry. What does the “D” in the State column indicate?

正解:
Explanation:
Under the heading “State” in the system show performance command output, there are several columns showing anybackground activities taking place in the filesystem during the sample period.
The states are:




References:
https://community.emc.com/docs/DOC-32514

Question No : 10
What is the default destination directory for compressed backups on a Dell EMC Data Domain system?

正解:
Explanation:
The /data/col1/backup directory is the default destination directory for compressed backup server data. Clients, such as backup servers that perform backup and restore operations with a Data Domain System, at the least, need access to the /data/col1/backup directory.
References:
https://community.emc.com/thread/199779?start=0&tstart=0

Question No : 11
What is a best practice recommendation for Veritas NetBackup servers configured for VTL backups to Dell EMC Data Domain systems?

正解:
Explanation:
Multiplexing, compression, and encryption of backup data were introduced to provide read parallelism as well as enhanced security and performance during backups. Backing up to a Data Domain system is inherently more secure than tape, and does not suffer performance degradation due to slow backup streams. Thus the recommendation is to disable any of these features when using a Data Domain system as the target for RMAN.
References:
https://community.emc.com/docs/DOC-35348

Question No : 12
Which server executes the read/write requests in a backup environment consisting of a Dell EMC Data Domain and IBM Spectrum Protect?

正解:
Explanation:



CommVault Simpana software is a data protection suite for large-scale enterprises.
The first Simpana system installed must be configured as a CommServe. A CommServe defines a backup domain called a CommCell™ that manages member Clients, Media Agents, and data protection storage resources. The CommServe contains a SQL database that keeps track of the various agents and data protection metadata, such as the media index.
A CommVault Media Agent server is any system, including the CommServe, that has the iDataMediaAgent installed.

Question No : 13
By default, when is file system cleaning performed on a Dell EMC Data Domain system that is enabled with Extended Retention?

正解:
Explanation:
A default schedule runs the clean operation every Tuesday at 6 a.m. (tue 0600) ) with 50% throttle.
References:
https://community.emc.com/docs/DOC-32486

Question No : 14
In an SMT environment, which Dell EMC Data Domain role is responsible for scheduling and running the backup application?

正解:
Explanation:
SMT = secure multi-tenancy.
References:
https://www.emc.com/collateral/white-papers/h14474-dd-smt-replication-service-solution-brief.pdf
https://www.emc.com/collateral/white-papers/h14474-dd-smt-replication-service-solution-brief.pdf

Question No : 15
A delivery specialist wants to integrate a Dell EMC Data Domain system into an existing backup environment using NAS. What are the supported protocols?

正解:
Explanation:
Dell Data Domain replicator protocols:



References:
https://www.emc.com/collateral/software/white-papers/h7082-data-domain-replicator-wp.pdf

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