[Configure and Utilize Nutanix Unified Storage] An administrator needs to configure a bare-metal server to boot from a Nutanix Volumes-hosted virtual disk. Which volume-group configuration option must be entered or selected for the client to boot over the network?

For network (iSCSI) boot the operating system must reside on LUN 0; therefore the Volume Group must expose a disk whose LUN ID is explicitly set to 0. Firmware/BIOS iSCSI boot code requests only LUN 0 during POST, so any other ID will not be discovered and the server will fail to boot.

A – CHAP adds authentication but is not required for boot. C – Advertising the CVM’s IP alone does not determine which LUN the client boots from. D – Adding the initiator to the whitelist controls access but does not satisfy the LUN 0 requirement.

1. Nutanix Volumes Service Guide v6.5, “Boot from SAN Using Volumes,” Step 4 “Set LUN ID to 0,” p.34.

2. Nutanix Solutions Brief “Booting Physical Servers from Nutanix iSCSI,” section “Volume-Group Configuration.”