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Free E20-393 Exam Braindumps

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)



An administrator’s Unity system is configured with both a Fibre Channel CNA and a Fibre Channel I/O module. Which Fibre Channel port on each SP must be used for native synchronous replication?

  1. CNA FC port 5
  2. I/O module FC port 2
  3. CNA FC port 4
  4. I/O module FC port 5

Answer(s): C

Explanation:

Only one FC port can be configured and used for synchronous replication. Once an FC port is assigned, it will continue to act as the synchronous replication port and can never be changed. To determine the FC port used for synchronous replication, in the CLI console, run the command /remote/sys show -detail. Port information, similar to the following example, will appear in the output:

Synchronous FC ports = spb_fc4, spa_fc4


Reference:

https://www.dellemc.com/en-us/documentation/unity-family/unity-p-replication-config/03-unity-rep-br-considerations-syncrep.htm






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