What are two functions of zoning in Fibre Channel Switches (Choose Two)?
A.
Restrict connections on a storage array to ESX Hosts that utilize the array
B.
Prevents non-ESX Hosts from possibly destroying VMFS data
C.
Controls and isolates LUNs on a Fibre Channel Storage Array
D.
Reduces the number of targets and LUNs presented by a Fibre Channel Storage Array
Explanation:
Fibre Channel SAN Configuration Guide ESX 4.0 ESXi 4.0 vCenter Server 4.0, page 53,
page 15.To restrict server access to storage arrays not allocated to that server, the SAN uses
zoning. [A above] Typically, zones are created for each group of servers that access a
shared group of storage devices and LUNs. Zones define which HBAs can connect to
which SPs. Devices outside a zone are not visible to the devices inside the zone.Since devices outside a zone are not visible to the devices inside the zone it would
rrevents non-ESX Hosts from accessing and possibly destroying VMFS data. [B above]
Using Zoning with Fibre Channel SANs
Zoning provides access control in the SAN topology. Zoning defines which HBAs can connect to which targets. When you configure a SAN by using zoning, the devices outside a zone are not visible to the devices inside the zone.
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.
With ESXi hosts, use a single-initiator zoning or a single-initiator-single-target zoning. The latter is a preferred zoning practice. Using the more restrictive zoning prevents problems and misconfigurations that can occur on the SAN.
For detailed instructions and best zoning practices, contact storage array or switch vendors.
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I understand that the correct answer are B and D.
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