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  1. Home
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  3. E20-393

EMC E20-393 Exam (page: 7)
EMC Unity Solutions Specialist Exam for Implementation Engineers
Updated on: 31-Mar-2026

Viewing Page 7 of 61
E20-393 PDF 297 Questions

A storage administrator wants to configure a Unity system to log system events to a remote log server. In order to allow access to the log server, which port should the administrator ensure is not blocked by the firewall?

  1. 514
  2. 714
  3. 1000
  4. 5179

Answer(s): A

Explanation:

The storage system supports logging user/audit messages to a remote host. By default, the storage system transfers log information on port 514 using UDP.


Reference:

https://www.emc.com/collateral/TechnicalDocument/docu69321.pdf (Page 31)



A Unity system LUN has a daily snapshot schedule with a Retention Policy of seven days. A hardware failure results in a double fault of the LUN.
Which snapshot behavior will be experienced?

  1. All of the snapshots will be unavailable to restore data from
  2. Data restoration is available from the oldest snapshot, all others are unavailable
  3. All of the snapshots will be available to restore data from
  4. Data restoration is available from the newest snapshot, all others are unavailable

Answer(s): D

Explanation:

The oldest snapshots residing on that pool with retention policy set to pool automatic deletion begin being deleted.



What describes multiple LUN snapshots?

  1. Captures multiple point-in-time data states.
    Snapshot data state is marked “unmodified” from its source when attached.
    Snapshot tree supports multiple simultaneous attaches.
  2. Captures multiple point-in-time data states.
    Snapshot data state is marked “unmodified” from its source when attached.
    Snapshot tree supports only one attach at a time.
  3. Captures multiple point-in-time data states.
    Snapshot data state is marked “modified” from its source when attached.
    Snapshot tree supports multiple simultaneous attaches.
  4. Captures multiple point-in-time data states.
    Snapshot data state is marked “modified” from its source when attached.
    Snapshot tree supports only one attach at a time.

Answer(s): D

Explanation:

Only a single snapshot per LUN can be attached at any given time, and must be detached prior to attaching another snapshot of the same LUN.



What is the maximum number of LUN snapshots that are supported by Unity?

  1. 16
  2. 96
  3. 256
  4. 512

Answer(s): C

Explanation:

Note: Logical Unit Number (LUN) – A block-level storage device that can be accessed using a protocol such as iSCSI.



At which stage in the Unity power up sequence would the Storage Processor enter Service mode upon detecting an error?

  1. After the CMI is started
  2. Bootflash
  3. POST
  4. BIOS

Answer(s): C

Explanation:

Note: Boot counters are a troubleshooting mechanism that is designed into the Unity architecture to help pinpoint the specific cause of software or hardware events during the boot sequence. If the Unity system detects a problem with software or hardware components, its corresponding Boot Counter is incremented. If a counter reaches a predefined threshold, the SP boots into Service Mode during its next boot cycle.


Reference:

https://www.emc.com/collateral/TechnicalDocument/docu69328.pdf (page 12)



Viewing Page 7 of 61



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concerned citizen 12/29/2023 11:31:00 AM

52 should be b&c. controller failure has nothing to do with this type of issue. degraded state tells us its a raid issue, and if the os is missing then the bootable device isnt found. the only other consideration could be data loss but thats somewhat broad whereas b&c show understanding of the specific issues the question is asking about.
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