x cluster? (Choose two

What are two requirements when configuring a Fibre Channel SAN with an ESXi 5.x cluster? (Choose two.)

What are two requirements when configuring a Fibre Channel SAN with an ESXi 5.x cluster? (Choose two.)

A.
RDMs must be zoned and masked to each ESXi 5 host in the cluster

B.
A FCP HBA or hardware supporting FCoE must be installed in the hosts

C.
Each LUN should contain only one NFS datastore.

D.
Each LUN must present a unique LUN ID to each ESXi hosts.



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xaverio

xaverio

B,D seems better:
view ESXi FC Requirements

gmac

gmac

A and B are correct.

A: correct because yes, you have to Zone and mask to allow only the Hosts in that you want in.

Zoning has the following effects:
– Reduces the number of targets and LUNs presented to a host.
– Controls and isolates paths in a fabric.
– Can prevent non-ESXi systems from accessing a particular storage system, and from possibly destroying
VMFS data.
– Can be used to separate different environments, for example, a test from a production environment.

B: correct because yes you need HBAs to connect to the FC.

C is obviously wrong as the FS is VMFS not NFS

D is wrong because: Page 37 of the vSphere storage guide says.

— For multipathing to work properly, each LUN must present the “same” LUN ID number to all ESXi hosts.

http://pubs.vmware.com/vsphere-50/topic/com.vmware.ICbase/PDF/vsphere-esxi-vcenter-server-50-storage-guide.pdf

angryant

angryant

A is NOT correct because:
– strictly speaking you zone/mask LUNs not RDMs. An RDM is the combination of a raw LUN and (its) the mapping file.
– IMO ‘A’ implies zoning (and masking) should be done on each host, which is wrong – you do zoning on the FC switch/director only.

‘D’ is very ambiguous answer and could mean 2 things:
a. each LUN should present a unique ID (WWN)to hosts – WWN of each LUN is unique and this condition is satisfied. D can be a correct answer.
b. each LUN should present a unique AND different ID (WWN) to any host which is not satisfied, the same unique WWN is presented to all attached (sharing) hosts/devices.

Raf

Raf

I think the answers need to be corrected,
A. You are correct, we never zone RDMs, we zone WWNs, bad terminology
B. FCOE? I thought we were doing FC it should be FC HBA
D is confusing, what if you present the same LUN to two different Hosts/VM, which are not sharing, the disk can only be initialized by one OS, an error occurs if another VM tries to initialize again

Rich

Rich

However poor the wording of A & B, C & D are definitely wrong.

George

George

A-yes,RDM masked to all hosts in cluster host
B-Yes, need Host Based adapter in each ESXi Host
C-no, NFS not available over FC only LUN available.
D-no, The LUN ID is same per host, WWN is unique per VM

a,b are correct