Installation routine on /dev/sd(x) missing boot flag.

Help with issues regarding installation of Debian

Installation routine on /dev/sd(x) missing boot flag.

Postby rin67630 » 2019-08-13 18:02

Could you please correct an old problem of the Debian installation routine?

If you chose to install on an USB stick, you may want to have to bootloader on that stick as well.
The installation routine let you chose to install grub on that drive. It will write the gruß bootloader, but omits to set the "boot" flag to the partition, so that the stick will not boot.
Wouldn't it be wise to set the "boot" flag to the USB-drive when the bootloader is written?

Thank you for considering
Regards
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Re: Installation routine on /dev/sd(x) missing boot flag.

Postby phenest » 2019-08-13 20:08

rin67630 wrote:Could you please

To whom are you referring? We are not Debian developers. You need to submit a bug report.
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Re: Installation routine on /dev/sd(x) missing boot flag.

Postby kreemoweet » 2019-08-14 00:06

GRUB does not read, write, or have any use for partition boot flags. Neither does the BIOS, which knows nothing
about partitions or partition tables or flags. EFI does not use boot flags either. The partition boot flag is a Windows-only thing.
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Re: Installation routine on /dev/sd(x) missing boot flag.

Postby p.H » 2019-08-14 09:15

kreemoweet wrote:the BIOS, which knows nothingabout partitions or partition tables or flags.

The BIOS should know nothing about partitions. Unfortunately, there are a number of broken BIOS out there which check and require that the boot flag is set on a partition in the MBR in order to allow to boot from the device.
kreemoweet wrote:The partition boot flag is a Windows-only thing.

Nope. It is a standard DOS/MBR boot code thing.
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