While trying to add iSCSI hosts to a host group, some of the hosts are not showing up within the Add Host Group list. What is causing this?

Question

Options

• AMissing hosts have mapped volumes
• BiSCSI CHAP is disabled
• CStorage network is not configured
• DMissing hosts are marked for iSCSI and FC

• A
  71% (24)
• B
  18% (6)
• C
  3% (1)
• D
  9% (3)

Explanation

Hosts with already-mapped volumes cannot be added to a host group because storage systems prevent conflicts between individual volume mappings and group-level mappings - a host can only belong to one mapping context at a time, so the system simply hides those hosts from the selection list.

Why the distractors are wrong:

• B (CHAP disabled): CHAP is an authentication mechanism; its state has no effect on whether a host appears in the host group selection list.
• C (Storage network not configured): If the network were unconfigured, the hosts wouldn't appear anywhere in the system - but the question implies they're known hosts, just absent from this specific list.
• D (Hosts marked for iSCSI and FC): Multi-protocol (dual-fabric) hosts are valid and are not excluded from host groups on that basis alone.

Memory tip: Think "already committed" - a host that has individual volume mappings is already in an exclusive relationship with specific volumes, so it can't simultaneously join a group. If hosts are missing from the group list, ask yourself: do they already have something mapped to them?

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