install/56213: 9.2 UEFI boot from USB image fails on HP DL380 G6

[he%NetBSD.org@localhost]

>Number:         56213
>Category:       install
>Synopsis:       9.2 UEFI boot from USB image fails on HP DL380 G6
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    install-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu May 27 14:00:00 +0000 2021
>Originator:     he%NetbSD.org@localhost
>Release:        NetBSD 9.2
>Organization:
I try...
>Environment:
	
	
System: NetBSD xxx.uninett.no 9.1_STABLE NetBSD 9.1_STABLE (GENERIC) #3: Mon Apr 12 10:46:29 CEST 2021 he%xxx.uninett.no@localhost:/usr/obj/sys/arch/amd64/compile/GENERIC amd64
Architecture: x86_64
Machine: amd64
>Description:
	Trying to boot a HP DL380 G6 system from an USB stick where
	the "img" install image for 9.2 has been dd'ed results in
	failure to boot.

	By the looks of it, the BIOS cannot be manually tweaked to do
	an "MBR boot".

	The first-stage boot loader loads and runs fine, but it fails
	to find /boot, so the boot fails in a cycle if the machine is
	left to it's own devices.
	
	I've also heard second-hand of UEFI boot of the "img" image
	failing in a virtualization environment, so the extent of the
	failure may be quite a bit wider than the narrow case of just
	the HP DL380 G6 systems.

>How-To-Repeat:
	Try to boot a HP DL380 G6 system from the USB install image,
	watch it fail to find /boot and therefore fail completely.

>Fix:
	I had to resort to using a USB-connected CD-ROM to get 9.2
	installed (the machine doesn't have built-in CD-ROM).

>Unformatted: