EMC E20-885 Online Practice Questions and Exam Preparation

EMC E20-885 Online Questions & Answers

• Question 21:

  Which LUN type presents more storage to an application than is physically allocated?

  A. Thick LUN
  B. Thin LUN
  C. RLP LUN
  D. Clone Private LUN
  B. Thin LUN

• Question 22:

  You are implementing a VDI solution provided by the project Solutions Architect at a customer site. After application testing, the Storage Administrator states that the solution is spread across more disks than anticipated. What explains why the solution design requires more disks than initially planned?

  A. The design accounts for excessive boot I/O in case of an HA event.
  B. The original request was for thin provisioning, but VDI environments require thick provisioning.
  C. Best practice for VDI solutions is to use RAID 6, and this was not done.
  D. Best practice for VDI solutions is to use RAID 1/0, and this was not done.
  A. The design accounts for excessive boot I/O in case of an HA event.

• Question 23:

  A storage administrator reports they are unable configure SAN Copy connections between two VNX. The required cabling is in place and zoning is correct, but the SP connections still do not appear in Unisphere Manager. What could have caused this issue?

  A. SAN Copy is not installed on both VNX arrays.
  B. SAN Copy is only licensed for local copies.
  C. The SP ports are already being used by hosts.
  D. Both VNX arrays are not in the same domain.
  D. Both VNX arrays are not in the same domain.

• Question 24:

  A customer has two VNX systems:

  At the local site, a VNX capable of performing 10,000 LUN IOPS At the remote site, a VNX capable of performing 7,000 LUN IOPS

  At the local site, application LUNs to be mirrored to the remote site perform 2,000 random 4 kB IOPS, with a R/W ratio of 4:1. At the remote site, application LUNs to be mirrored to the local site perform 1,200 random 8 kB IOPS, with a R/W

  ratio of 3:1. The utilization of both systems must be 70% or lower. MirrorView/A will be used to replicate the data. How much throughput can be performed by other applications at the local and remote sites?

  A. Local: 3,200 IOPS; Remote: 1,300 IOPS
  B. Local: 4,600 IOPS; Remote: 3,100 IOPS
  C. Local: 5,600 IOPS; Remote: 4,100 IOPS
  D. Local: 6,800 IOPS; Remote: 4,600 IOPS
  A. Local: 3,200 IOPS; Remote: 1,300 IOPS

• Question 25:

  A client has an EMC VNX configured with four storage ports, four 15-drive DAEs (disk array enclosures) and a total of forty drives (20 NL-SAS and 20 SAS drives). The client is using RAID 5 (4+1) RAID groups with a traditional LUN configuration.

  What is the recommended SAS LCC port configuration for optimal performance?

  A. Distribute drives evenly across all ports
  B. Distribute drives on all odd ports
  C. Distribute drives on all even ports
  D. Distribute drives on a single port
  A. Distribute drives evenly across all ports

• Question 26:

  A customer wants to reduce the performance impact incremental SAN Copy (ISC) has on their source LUN. They plan to use a clone between the current source and destination LUN, and then use the fractured clone as the new ISC source LUN. The source LUN performs four hundred 8 KB random I/O per second, with a 3:1 read/write ratio.

  The source LUN is 512 GB in size, and the clone will be fractured for five minutes. How much data will be copied to the destination LUN?

  A. 7,500 MB
  B. 3,750 MB
  C. 937.5 MB
  D. 15,000 MB
  A. 7,500 MB

• Question 27:

  You implement FAST VP on an existing EMC VNX. The Extreme Performance pool holds 5% of usable storage, the Performance pool holds 20%, and the Capacity pool holds 75%. The Tiering Policy is set to Auto.

  The attached hosts run several applications. Some applications access data frequently, while others are write-once read-never. Twenty minutes after tiering is started, the customer reports there is no performance improvement. How should you respond?

  A. Data relocation involves a warm-up period the performance benefit is seen over the long term.
  B. The Performance pool is too large for effective data relocation.
  C. The warm-up period for FAST VP is determined by the size of the Capacity pool.
  D. Three-level tiering is not supported in FAST VP.
  A. Data relocation involves a warm-up period the performance benefit is seen over the long term.

• Question 28:

  You are installing a new VNX and need to implement a Storage Pool on the array. Disks are available and must be set up as follows:

  10, 400 GB SSD in R10 (4+4) for the Extreme Performance tier 13, 600 GB + 15K SAS R10 (4+4) for the Performance tier 12, 4 TB NL-SAS R6 (14+2) for the Capacity tier

  Disks for FAST Cache, Vault, and unbound disks for sparing, are allocated separately.

  How should you lay out the private RAID groups?

  A. Extreme Performance tier: 1 R10 (4+4) +1 R10 (1+1) Performance tier: 2 R5 (4+1) + 1 R5 (2+1) Capacity tier: 1 R6 (10+2)
  B. Extreme Performance tier: 1 R10 (5+5) + 2 unbound Performance tier: 2 R5 (4+1) + 1 R5 (2+1) Capacity tier: 1 R6 (10+2)
  C. Extreme Performance tier: 1 R10 (4+4) + 1 R10 (1+1) Performance tier: 2 R5 (4+1) + 1 R5 (2+1) Capacity tier: 1 R6 (4+2) + 1 R6 (4+2)
  D. Extreme Performance tier: 1 R10 (4+4) + 2 unbound Performance tier: 2 R5 (4+1) + 1 R5 (2+1) Capacity tier: 1 R6 (4+2) + 1 R6 (4+2)
  A. Extreme Performance tier: 1 R10 (4+4) +1 R10 (1+1) Performance tier: 2 R5 (4+1) + 1 R5 (2+1) Capacity tier: 1 R6 (10+2)

• Question 29:

  A customer has a newly installed EMC RecoverPoint cluster with vRPA configuration. The IP based replication is not working. The newly installed vRPA VNX splitter is shown as down.

  The splitter log error message states:

  getOverrideScanInterval: no path to any box in any cluster - assuming disaster in all clusters

  What could be the possible reason for this?

  A. The vRPA splitter version is not compatible with the RecoverPoint version.
  B. The vRPA splitter version is not higher than the RecoverPoint version.
  C. The RecoverPoint version is not higher than the vRPA splitter version.
  D. The vRPA splitter credentials are not available.
  A. The vRPA splitter version is not compatible with the RecoverPoint version.

• Question 30:

  What is a benefit of upgrading to RecoverPoint/SE 4.0 for users of VMware SRM?

  A. Selectable point-in-time copies
  B. No SRM license required
  C. Integration with vCenter Server
  D. Multiple copies supported
  A. Selectable point-in-time copies