A storage administrator is configuring SAN switches and zoning to connect an eight X-Brick XtremIO array. A VMware ESXi server is hosted on a blade chassis with 16 HBA ports. In addition, the SAN is…

Question

Exhibit

Options

• ATwo HBA connections per host connected to a single switch Multiple initiators/multiple targets per
• BConnect a single storage controller to the first switch
• CConnect all N1 storage controllers to the first switch
• DMultiple HBA connections per host

• A
  3% (1)
• B
  78% (25)
• C
  6% (2)
• D
  13% (4)

Explanation

In an environment where a host with two HBAs (VMware Best Practice) is connected to two fabrics and storage array with two Storage Controllers (EMC VNX, for example) the host will have four paths to a LUN: 2 Controllers x 2 HBAs = 4 paths If you go to the extreme and configure your XtremIO with eight X-Brick, you have 16 controllers. Again, two HBAs per host and the max number of LUNs you can attach to an ESXi host will be 32... I understand, different OS'es may have different limits than VMware and this logic will not be If you have hit the limit of 1024 paths per host (1024 / 4 controllers / 2 HBAs = 128 LUNs) and need to provision more LUNs, the best way will be to re-zone the host to limit the number of X- Bricks / Controllers the host HBA can connect to. The following diagram displays the logical connection topology for 4 paths. Incorrect Answers: D: Eliminate single-initiator to single-target zones.

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