Arch Linux

argentite

Member

Registered: 2019-07-23

Posts: 1

Blacklist/whitelist partitions for os-prober

Hi,
I recently installed Arch on a laptop with Windows 10 dual boot. I am not allowed to remove Windows for now. I installed os-prober and it detects Windows correctly.
But it also detects and adds an entry for an unknown OS in a partition which is not supposed to contain any bootable code. I'm not sure what it contains and don't want the option to be present in case accidentally running corrupted code somehow damages something.

Grub configuration entries from os-prober (2nd one is the unknown OS):

### BEGIN /etc/grub.d/30_os-prober ###
menuentry 'Windows 10 (on /dev/sda1)' --class windows --class os $menuentry_id_option 'osprober-chain-3EF6AE12F6ADCA8B' {
        insmod part_msdos
        insmod ntfs
        set root='hd0,msdos1'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-ieee1275='ieee1275//disk@0,msdos1' --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-bareme
tal=ahci0,msdos1  3EF6AE12F6ADCA8B
        else
          search --no-floppy --fs-uuid --set=root 3EF6AE12F6ADCA8B
        fi
        parttool ${root} hidden-
        drivemap -s (hd0) ${root}
        chainloader +1
}
menuentry 'MS-DOS 5.x/6.x/Win3.1 (on /dev/sda3)' --class ms_dos --class os $menuentry_id_option 'osprober-chain-14E8B674E8B65428' {
        insmod part_msdos
        insmod ntfs
        set root='hd0,msdos3'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-ieee1275='ieee1275//disk@0,msdos3' --hint-bios=hd0,msdos3 --hint-efi=hd0,msdos3 --hint-baremetal=ahci0,msdos3  14E8B674E8B65428
        else
          search --no-floppy --fs-uuid --set=root 14E8B674E8B65428
        fi
        parttool ${root} hidden-
        drivemap -s (hd0) ${root}
        chainloader +1
}
### END /etc/grub.d/30_os-prober ###

$ lsblk --fs
NAME   FSTYPE LABEL           UUID                                 FSAVAIL FSUSE% MOUNTPOINT
sda                                                                               
├─sda1 ntfs   System Reserved 3EF6AE12F6ADCA8B                      157.4M    71% /mnt/windows-boot
├─sda2                                                                            
├─sda3 ntfs                   14E8B674E8B65428                       13.1G    93% /mnt/Entertainment
├─sda4 ext4                   d15093ac-f7cd-4f62-a6d6-57fe98a2c742   77.7G    16% /
├─sda5 ntfs   Windows         84C05238C05230A2                                    
└─sda6 ntfs   Disk Images     D062B17462B15FC0

I can edit the grub.cfg file and remove the item but it will be regenerated again. Is there a way to exclude partitions for probing or just whitelist the partitions to be searched?

Thanks!