Server Fault Stack Exchange
Server Fault Stack Exchange

Questions tagged [uefi]

Unified Extensible Firmware Interface (UEFI) is a specification that defines a software interface between an operating system and platform firmware (BIOS)

137 questions
4
votes
1 answer

BTRFS-RAID and booting from EFI system partition

UEFI requires booting from a ESP which is most of the time formatted as vFAT. If I recall correctly BTRFS could have sub-volumes formatted as ext3/ext4 like the Logical Volume Manager (LVM). However, UEFI doesn't support booting from BTRFS. Most of…
phbi
  • 41
  • 3
4
votes
2 answers

Reimage a Hyper V Gen 2 / UEFI VM

So we finally bit the bullet and started using UEFI for our desktops. It works perfectly for our Hyper V images - we can create gen 2 VMs all day long. This is true until we need to reimage. How do I set a Gen 2 VM with an existing OS to boot from…
Tim Brigham
  • 15,465
  • 7
  • 72
  • 113
4
votes
5 answers

Changing uEFI boot order from Windows

I can't get Windows to change the uEFI boot order to PXE boot first from within windows. I'm trying to automate the system so that it PXE boots every time, so I can control the boot option. I've tried BCDEdit: bcdedit /set {fwbootmgr} DEFAULT
Collin Reynolds
  • 41
  • 1
  • 1
  • 2
4
votes
1 answer

Images (e.g. with Clonezilla) of Windows and Linux on a UEFI computer

I use Clonezilla with success for many years to make images from partitions that host Windows 7 or smaller and Ubuntu and other operating systems. Making images and restore them was easy for me. But now with the advent of UEFI I‘m not sure how to…
Fango
  • 149
  • 3
4
votes
1 answer

Server 2012 R2 FSRM Event ID 8197 Error: GetVolumeNameForVolumeMountPoint, 0x800700001, incorrect function

I found next to no information about this error with respect to Server 2012. There is a good deal of information out about this error with Server 2003 with a update package fix from Microsoft as well as notes about how the error has been resolved…
DigiMij
  • 151
  • 1
  • 1
  • 4
4
votes
4 answers

What do I need to send an Extended DHCPOFFER with multiple boot options?

According to Wikipedia and a bazillion other pages, you can have: Proxy DHCP If a PXE redirection service (Proxy DHCP) receives an extended DHCPDISCOVER, it replies with an extended DHCPOFFER to the client's port 68/UDP (DHCP client port). An…
MikeyB
  • 38,725
  • 10
  • 102
  • 186
4
votes
5 answers

Xen only sees 512MB of System RAM. Should be 8GB. (UEFI boot)

I am booting Xen 4.0 from Debian Squeeze, kernel 2.6.32-5-xen-amd64. "xm dmesg" on dom0 shows: Xen-e801 RAM map: 0000000000000000 - 0000000000091400 (usable) 0000000000100000 - 0000000020000000 (usable) System RAM: 511MB (523844kB) "xm info"…
lmz
  • 379
  • 2
  • 4
  • 17
3
votes
1 answer

How do I mount the OS (system) disk from the UEFI shell?

I have to run a firmware update script that lives on the first hard drive of an Intel server board. I must use the UEFI shell to run this script, according to the Intel docs. (Our servers have no external USB ports, so please don't suggest this.) I…
mr.zog
  • 902
  • 3
  • 16
  • 36
3
votes
1 answer

dnsmasq proxyDHCP PXE and EFI "start_image() returned Invalid Parameter"

I'm tying to install a PXE install server with dnsmasq in proyxDHCP mode. So far legacy BIOS install is working. When I try to use EFI it fails. With dhcpd the EFI boot is working. Therefore the shim.efi file should be fine. Unable to fetch TFTP…
qwertbert23
  • 41
  • 1
  • 6
3
votes
2 answers

Is it possible to access network resources through an EFI shell?

I keep seeing allusions to the idea that EFI / UEFI shells support network resources with an extension, but I don't seem to be able to find anything concrete. I'm trying to get sas3flash.efi on to a local system from a network resource in the EFI…
Locane
  • 409
  • 1
  • 7
  • 20
3
votes
1 answer

Syslinux: How to correctly configure for UEFI PXE boot?

A variety of machines will happily boot a custom bzImage via PXE in legacy mode using syslinux. In UEFI mode, one of these machines and a newer UEFI only board get assigned an IP address, TFTP syslinx.efi from the server and then freeze. Now I'm…
J Evans
  • 155
  • 1
  • 7
3
votes
1 answer

UEFI iPXE boot into debian results in grub shell

For a bit of context, I'm a sysadmin student, trying to expand my network knowledge since it's not my strongest point. Currently, I'm experimenting with PXE. A few days ago, I set up a few ESXi Virtual Machines, one being a DHCP and TFTP server, and…
kRYOoX
  • 133
  • 1
  • 4
3
votes
2 answers

Convert From UEFI to Legacy BIOS in Windows Server 2012

We are looking into Azure Site Recovery as a possible BCDR solution, and have encountered a bit of an issue in that Azure doesn't support UEFI firmware when synchronizing VMWare VMs. Is there any way to convert from EFI firmware to Legacy without…
Justin Jahn
  • 193
  • 1
  • 7
3
votes
1 answer

Esxi hypervisor install: uefi or bios?

I recently bought Dell PowerEdge T430 server and I want to install on it ESXi 6.0. Since VMware now supports UEFI (from version 5.0) I want to ask how to install hypervisor? BIOS UEFI After install, changing bios/uefi settings in um... Bios will…
termil0r
  • 123
  • 1
  • 6
3
votes
2 answers

How do UEFI and virtual machines relate to each other?

I am trying to get my head around UEFI (Unified Extensible Firmware Interface) and it's not entirely clear to me how this affects virtual machines. Thus, there are three parts to this question: Is UEFI an advance in hardware support for…
Iterator
  • 135
  • 6
1
2
3
…
9 10