NS0-157 · Question #80
A customer's Linux Oracle database requires a SAN solution with multiple FC connections for path resiliency and performance. The host has been provisioned with two dual-port FC HBAs, and each HBA is…
The correct answer is C. if the DM-MP with ALUA support is configured on the host D. the WWPNs of all the FC ports in the host. Before configuring FC SAN storage for a Linux host, the administrator must collect the host WWPNs for zoning and igroup creation, and confirm whether DM-MP with ALUA is active to ensure the storage is configured with the correct OS type and path presentation.
Question
A customer's Linux Oracle database requires a SAN solution with multiple FC connections for path resiliency and performance. The host has been provisioned with two dual-port FC HBAs, and each HBA is connected to each fabric. Before configuring the storage, what host information should the storage administrator obtain from the customer? (Choose two.)
Options
- Aif the FC HBAs ports are all configured for an active/passive configuration.
- Bthe amount of cache memory installed in the host
- Cif the DM-MP with ALUA support is configured on the host
- Dthe WWPNs of all the FC ports in the host
How the community answered
(22 responses)- A14% (3)
- B5% (1)
- C82% (18)
Why each option
Before configuring FC SAN storage for a Linux host, the administrator must collect the host WWPNs for zoning and igroup creation, and confirm whether DM-MP with ALUA is active to ensure the storage is configured with the correct OS type and path presentation.
Whether HBA ports are active/passive is governed by the multipath software (DM-MP) configuration already captured in option C; it is not a separate piece of information the storage administrator needs to collect independently.
Host cache memory size has no bearing on FC zoning, igroup creation, LUN mapping, or multipath configuration and is irrelevant to the storage provisioning task.
Device Mapper Multipath (DM-MP) with ALUA support must be confirmed because ALUA determines how the storage presents active-optimized versus active-non-optimized paths; the NetApp igroup must be set to the correct OS type so that ALUA path states align with the host multipath driver expectations.
The WWPNs of all FC HBA ports are required to configure fabric zoning on the switches and to add the host initiators to the igroup on the NetApp system, which is the mechanism that grants the host access to specific LUNs.
Concept tested: FC SAN host requirements - WWPNs and DM-MP ALUA configuration
Source: https://docs.netapp.com/us-en/ontap-sanhost/hu_rhel_90.html
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