EMC EMC Specialist E20-390 Questions & Answers

• Question 401:

  An administrator has finished configuring the zoning on their MDS-series switch and issues the following command:

  zoneset activate name ActiveZS vsan 100

  What happens?

  A. Zoneset ActiveZS is activated on VSAN 100

  B. Zoneset ActiveZS is created on VSAN 100

  C. VSAN 100 is created and activated.

  D. VSAN 100 is named ActiveZS

  Correct Answer: B

• Question 402:

  Which utility on a Windows server can be used to view the HBA WWN details?

  A. Unisphere Host Agent

  B. Unisphere Server Utility

  C. HBAnywhere

  D. Device Manager

  Correct Answer: C

• Question 403:

  An administrator tries to modify the quota settings on a CIFS share from a Windows Server 2003 host, but the Quota tab does not exist in the network drive properties. What could be a possible cause?

  A. Quotas can be managed only with Windows Server 2008

  B. The user does not have administrator privileges on this share

  C. Exporting is implemented at the file system subdirectory level on VNX OE for File.

  D. Windows users cannot modify the quota settings

  Correct Answer: C

  Explanation:

  There is a limitation in exporting a subdirectory and setting a quota on a file system from Windows

  2000/2003/08. You will not see a quotas tab when exporting at the subdirectory level.

• Question 404:

  What is the fan-in ratio for MirrorView/A?

  A. 1: 1

  B. 2: 1

  C. 4: 1

  D. 8: 1

  Correct Answer: C

• Question 405:

  What is the maximum number of Fibre Channel initiator ports, per Linux host, supported by VNX for Block?

  A. 8

  B. 4

  C. 16

  D. 32

  Correct Answer: C

  Explanation:

  For all Linux environments, EMC supports up to 16 Fibre Channel initiator ports on a single host. The host

  initiators may be single or dual channel HBAs.

• Question 406:

  In a VNX array with FAST VP enabled, what is the size of the data slice (chunk) that can be relocated between tiers?

  A. 1 GB

  B. 2 GB

  C. 5 GB

  D. 10 GB

  Correct Answer: A

  Explanation: For example, if you have Flash (SSD) disks, SAS disks, and NL-SAS disks in the pool, the Flash disks form a tier, the SAS disks form a tier, and the NL-SAS disks form a tier. Based on your input or internally computed usage statistics, portions of LUNs ( 1GB slices) can be moved between tiers to maintain a service level close to the highest performing storage tier in the pool, even when some portion of the pool consists of lower performing (less expensive) disks. The tiers from highest to lowest are Flash, SAS, and NL-SAS. FAST is not supported for RAID groups because all the disks in a RAID group, unlike in a pool, must be of the same type (all Flash, all FC, or all SATA). The lowest performing disks in a RAID group determine a RAID group's overall performance.

• Question 407:

  Where in Unisphere do you assign FAST Cache to LUNs?

  A. At the LUN level under a RAID group

  B. At the LUN level under a storage pool

  C. Under FAST Cache system properties

  D. Under the Advanced tab of RAIDGROUP Properties

  Correct Answer: A

• Question 408:

  How does the VNX handle LUN ownership changes so that the access path to the LUN is available to both SPs simultaneously?

  A. By the host software being aware of SP ownership

  B. By the SPs sharing ownership of the LUNs

  C. By using ALUA Failover Mode

  D. By the LUN being trespassed.

  Correct Answer: C

  Explanation:

  ALUA (Asymmetric Logical Unit Access) is a request forwarding implementation. In other words, the LUN

  is still owned by a single SP however, if I/O is received by an SP that does not own a LUN, that I/O is

  redirected to the owning SP. It 's redirected using a communication method to pass I/O to the other SP.

• Question 409:

  The preferred path to your VMware ESX host failed. Which native multi-pathing policy will revert to the preferred path when it is restored?

  A. Fixed only

  B. MRU only

  C. Round-robin

  D. Bath Fixed and MRU

  Correct Answer: A

  Explanation:

  Native ESX/ESXi Multipath is managed via the configuration of a failover policy. Policy options are:

  MRU (Most Recently Used) uses last active path, and does not fail back when a path is restored

  Fixed (Preferred path) reverts back to preferred path when it is restored to service

  Round Robin rotates the path selection between all available paths and enables basic load balancing across the paths.

  This algorithm is not adaptive, so it will flip from one channel to the other with no regard for the work load unlike PowerPath, nor is it responsive to queue depth. NotE. Prior to vSphere, there was no way to load balance a LUN indigenously and customers needed to statically distribute LUNs across paths.

• Question 410:

  Which Linux distribution supports both MPFS and pNFS?

  A. CentOS

  B. RedHat

  C. Fedora

  D. Debian

  Correct Answer: B

  Explanation: