On Wed 16 May 2018 at 00:23:43 (+0200), Pascal Hambourg wrote:
> Le 15/05/2018 à 03:37, David Wright a écrit :
> >
> >>But GRUB is not the only available bootloader.
> >
> >No.
> >
> >It's difficult to divine which bootloaders the author is familiar with.
> >My own experience of the last twenty yea
On Wed 16 May 2018 at 00:35:33 (+0200), Pascal Hambourg wrote:
> Le 15/05/2018 à 03:23, David Wright a écrit :
> >
> >In this particular instance (the Lenovo), its PDF says:
> (...)
> > The default boot mode for your computer is UEFI mode. If you need to
> > install a legacy operating syste
Hi,
i wrote:
> > - Compromise is to set the boot flag on a dummy partition of type 0x00.
> > This is barely UEFI-compliant because the specs say that a partition of
> > type 0x00 shall be regarded as non-existent.
Pascal Hambourg wrote:
> - I had to use the old fdisk version from Wheezy bec
Le 16/05/2018 à 00:10, Pascal Hambourg a écrit :
Le 15/05/2018 à 08:51, Thomas Schmitt a écrit :
Summary:
- Boot flag on MBR partition of type 0xEE is bad on several EFI
implementations.
- No MBR partition with boot flag is bad on some very few BIOS
implementations.
Not so few in my exp
On 16-May-18 00:23, Pascal Hambourg wrote:
Le 15/05/2018 à 03:37, David Wright a écrit :
But GRUB is not the only available bootloader.
No.
It's difficult to divine which bootloaders the author is familiar with.
My own experience of the last twenty years is limited to Lilo and Grub.
Same
Le 15/05/2018 à 03:23, David Wright a écrit :
In this particular instance (the Lenovo), its PDF says:
(...)
The default boot mode for your computer is UEFI mode. If you need to
install a legacy operating system, such as Windows (that is, any operating
system before Windows 8)
Le 15/05/2018 à 03:37, David Wright a écrit :
But GRUB is not the only available bootloader.
No.
It's difficult to divine which bootloaders the author is familiar with.
My own experience of the last twenty years is limited to Lilo and Grub.
Same here. I would not trust LILO any more now be
Le 15/05/2018 à 08:51, Thomas Schmitt a écrit :
Summary:
- Boot flag on MBR partition of type 0xEE is bad on several EFI
implementations.
- No MBR partition with boot flag is bad on some very few BIOS
implementations.
Not so few in my experience.
- Compromise is to set the boot flag on
Hi,
i wrote:
> > And as said previously, BIOS does not expect any partitions.
Pascal Hambourg wrote:
> experience taught me that many BIOS implementations wrongly
> expect an MBR partition entry with the boot flag set in order to boot from
> the disk.
You are right (and those firmwares are wrong
On Mon 14 May 2018 at 23:29:43 (+0200), Pascal Hambourg wrote:
> Le 14/05/2018 à 02:02, David Wright a écrit :
> >On Sun 13 May 2018 at 19:08:48 (+0200), Pascal Hambourg wrote:
> >>
> >>Most of my early experience with UEFI boot comes from a rather old
> >>Intel motherboard. Beside crippled UEFI su
On Mon 14 May 2018 at 23:39:06 (+0200), Pascal Hambourg wrote:
> Le 14/05/2018 à 16:33, David Wright a écrit :
> >
> > "Don’t do UEFI-native installs to MBR-formatted disks, or BIOS
> > compatibility installs to GPT-formatted disks (an exception to the
> > latter is if your disk is, IIR
On Mon 14 May 2018 at 11:56:11 (-0400), Stefan Monnier wrote:
> > Yes, documentation of firmware is almost unknown in my experience
> > (since probably 30 years ago). That's why I took the least invasive
>
> It's documented to the extent that it says "implements UEFI" and that
> UEFI is documented
Chris Ramsden wrote:
> On 2018-05-14 01:21, songbird wrote:
>> Pascal Hambourg wrote:
>> ...
>>> I agree with the author. If you want to keep the existing EFI Windows
>>> installation and have a convenient dual boot with GRUB, you'll have to
>>> set up your favourite distribution to boot in EFI m
Le 14/05/2018 à 17:50, Thomas Schmitt a écrit :
And as said previously, BIOS does not expect any partitions.
In theory. All it should expect is the MBR signature 0xAA55. But as said
previously, experience taught me that many BIOS implementations wrongly
expect an MBR partition entry with the
Le 14/05/2018 à 16:33, David Wright a écrit :
"Don’t do UEFI-native installs to MBR-formatted disks, or BIOS
compatibility installs to GPT-formatted disks (an exception to the
latter is if your disk is, IIRC, 2.2+TB in size, because the MBR
format can’t handle disks that big
Le 14/05/2018 à 02:02, David Wright a écrit :
On Sun 13 May 2018 at 19:08:48 (+0200), Pascal Hambourg wrote:
Most of my early experience with UEFI boot comes from a rather old
Intel motherboard. Beside crippled UEFI support (no UEFI boot from
USB or SATA in AHCI mode), it had a couple of annoyi
> Yes, documentation of firmware is almost unknown in my experience
> (since probably 30 years ago). That's why I took the least invasive
It's documented to the extent that it says "implements UEFI" and that
UEFI is documented.
>> Same here (basically for the same reason: the behavior of the firm
Hi,
Stefan Monnier wrote:
> > the behavior of the firmware
> > and OS when faced with a disk that has both a GPT and an MBR partitions
> > is largely unspecified and will vary depending on your system).
David Wright wrote:
> I've yet to see a GPT disk that didn't have a protective MBR.
> I though
On 2018-05-14 14:55, David Wright wrote:
> Would I be correct in thinking that the BIOS POST boot screen is
> what you get when you hit F12 sufficiently quickly after switch-on?
> So are you choosing between UEFI and Legacy (compatibility) mode.
> (I would like to know how Dell handles what I've be
On Mon 14 May 2018 at 09:14:23 (-0400), Stefan Monnier wrote:
> > That said, there are other statements that are odd:
>
> Not sure what you find odd about them:
>
> > "I really can’t recommend strongly enough that you do not attempt
> > to mix UEFI-native and BIOS-compatible booting of
>
On Mon 14 May 2018 at 13:28:56 (+0100), Chris Ramsden wrote:
> On 2018-05-14 01:21, songbird wrote:
> > Pascal Hambourg wrote:
> > ...
> >> I agree with the author. If you want to keep the existing EFI Windows
> >> installation and have a convenient dual boot with GRUB, you'll have to
> >> set up
> That said, there are other statements that are odd:
Not sure what you find odd about them:
> "I really can’t recommend strongly enough that you do not attempt
> to mix UEFI-native and BIOS-compatible booting of
> permanently-installed operating systems on the same computer, and
>
On 2018-05-14 01:21, songbird wrote:
> Pascal Hambourg wrote:
> ...
>> I agree with the author. If you want to keep the existing EFI Windows
>> installation and have a convenient dual boot with GRUB, you'll have to
>> set up your favourite distribution to boot in EFI mode. If you want to
>> go
Pascal Hambourg wrote:
...
> I agree with the author. If you want to keep the existing EFI Windows
> installation and have a convenient dual boot with GRUB, you'll have to
> set up your favourite distribution to boot in EFI mode. If you want to
> go back to legacy boot, including for Windows, yo
On Sun 13 May 2018 at 19:08:48 (+0200), Pascal Hambourg wrote:
> Le 13/05/2018 à 17:18, David Wright a écrit :
> >On Fri 11 May 2018 at 15:13:04 (-0500), Kent West wrote:
> >>
> >>That's good to know. I guess my source material (
> >>https://www.happyassassin.net/2014/01/25/uefi-boot-how-does-that-
Le 13/05/2018 à 17:18, David Wright a écrit :
On Fri 11 May 2018 at 15:13:04 (-0500), Kent West wrote:
That's good to know. I guess my source material (
https://www.happyassassin.net/2014/01/25/uefi-boot-how-does-that-actually-work-then/)
is wrong. Or I misunderstood it.
While a lot of the de
On Fri 11 May 2018 at 15:13:04 (-0500), Kent West wrote:
> On Fri, May 11, 2018 at 2:59 PM, Pascal Hambourg
> wrote:
>
> > Le 11/05/2018 à 20:33, Kent West a écrit :
> >
> >>
> >> I learned that EFI boot drives need to have a GPT partition table. On a
> >>
> >
> > This is not correct. The UEFI sp
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