Configure Hosts for Multipathing CERTIFIED-IMPLEMENTATION-ENGINEER-SAN-E-SERIES Practice Questions (Page 5)

Questions 21–23

1. 21application · medium

   A small business is deploying an E-Series array with a single Linux host. The host has two Fibre Channel HBAs, but the business does not have a second Fibre Channel switch. Both HBAs are connected to the same switch. The administrator wants to configure multipathing for redundancy. What is the most important consideration in this design?

   • AThe administrator must configure the E-Series array in 'Active/Passive' mode for multipathing to work with a single switch.
   • BMultipathing will provide failover if an HBA or cable fails, but not if the single switch fails.
   • CThe administrator should use a single HBA to avoid complexity, since multipathing is not beneficial with a single switch.
   • DMultipathing will not work because the HBAs are connected to the same switch.
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2. 22expert · hard

   A Linux host with multipathing configured to an E-Series array is experiencing slow I/O performance. The 'multipath -ll' output shows all four paths as 'active', but the I/O is still slow. The administrator suspects that the load balancing policy is not distributing I/O effectively. What should the administrator do to improve performance?

   • AChange the path selector to 'service-time' to improve load balancing.
   • BCheck the current path grouping and verify that the paths are correctly distributed across both HBAs and switches.
   • CReboot the host to reset the multipath configuration.
   • DIncrease the number of I/O requests in the queue to improve throughput.
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3. 23application · medium

   A hospital's E-Series array is connected to a Windows Server 2019 host through two Fibre Channel HBAs, each with two paths to the storage (four total paths). The storage administrator wants to ensure that if one HBA fails, I/O continues without interruption, and that all healthy paths are used for active I/O. The host is running the native Windows multipathing feature. What should the administrator configure to meet these requirements?

   • AEnable MPIO, add the E-Series device to the 'DSM' list, and set the load balance policy to 'Round Robin'.
   • BConfigure the HBA BIOS to enable 'Persistent Binding' and set the Windows disk timeout to 60 seconds.
   • CInstall the vendor-specific E-Series multipath driver and configure it to use 'Least Queue Depth' for path selection.
   • DEnable MPIO and set the load balance policy to 'Failover Only' so that only one path is used and the others remain as standby.
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