Delaying the boot operation is useful for changing BIOS or EFI settings such as the boot order. For example, you can change the BIOS or EFI settings to force a virtual machine to boot from a CD-ROM.
Prerequisites
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vSphere Web Client logged in to a vCenter Server
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Access to at least one virtual machine in the inventory
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Privileges to edit boot options for the virtual machine
Procedure
1
In the VM Hardware panel, click Edit Settings.
2
Click VM Options.
3
Click the Boot Options triangle to expand the options.
4
Select the time in milliseconds to delay the boot operation.
5
(Optional) Select whether to force entry into the BIOS or EFI setup screen the next time the virtual machine boots.
6
(Optional) Select whether to try to reboot after a boot failure.