EFI, UEFI, PXE: FreeBSD-12.1-RELEASE-amd64-bootonly.iso boot from SAN device failed, error 0x7f22208e
vas at sibptus.ru
Tue Dec 29 07:40:27 UTC 2020
Dave Hayes wrote:
> > > > Was this happening over network (PXE boot) or from a physical medium
> > > > like USB drive/CD-ROM ?
> > >
> > > Actually both. However, this thread implied that the mfsBSD/ramdisk
> > > techniques did not work, and I wanted to provide a datapoint to the
> > > contrary.
> > >
> > > We have one installation which gets the ISO image over FTP and boots from
> > > that,
> > Can you please elaborate on that? Is this installation using UEFI or
> > legacy mode loader? What tools are used? pxelinux/memdisk or anything else?
> This particular installation is a Dell DRAC that has the capability of booting
> given an http url for a bootable iso. There actually is still some problem
> booting the hybrid disk in BIOS mode, but UEFI works just fine. Highly
> effective on an isolated network.
Ah, is this more like IPMI booting, where you can attach an ISO image to
the IPMI console which has its own networking stack, management
> I don't think this is quite what you are after, though I could be mistaken.
> I did try the PXEBOOT idea on the exact same hardware platform and
> was unable to get it to work, back at FreeBSD 10->11.
I have pxelinux+pxeboot+mfsBSD working fine, but with legacy BIOS.
> Do you know of any technical reading that can get one up to speed on the low
> level details of UEFI booting and how it is different from BIOS? One problem in
> debugging all these methods is the ever-present lack of documentation. :/
No, I don't. My knowledge of the thing is very rudimentary. I know that
the UEFI "BIOS" looks for the "efi" type partition in the GPT, or for
the EF partition in the MBR, finds a EFI executable under some special
path like /EFI/BOOT/BOOTX64.EFI, and this EFI executable is supposed to
know how to load the main OS.
Therefore my cheat sheet for making a UEFI bootable freebsd UFS volume is
gpart create -s gpt ada1 # will become ada0
gpart add -s200M -t efi ada1
gpart add -s2G -t freebsd-swap ada1
gpart add -t freebsd-ufs ada1
gpart bootcode -p /boot/boot1.efifat -i 1 ada1
Instead of "gpart bootcode -p /boot/boot1.efifat -i 1 ada1" we can just
as well run
"newfs_msdos /dev/ada1p1 ; mount_msdosfs /dev/ada1p1 /mnt ; rsync -r ... /mnt"
Victor Sudakov, VAS4-RIPE, VAS47-RIPN
2:5005/49 at fidonet http://vas.tomsk.ru/
-------------- next part --------------
A non-text attachment was scrubbed...
Size: 455 bytes
Desc: not available
More information about the freebsd-questions