Os-prober takes looooong time to finish

Support Software & Applications
#1

Hello,

I’ve updated today my manjaro KDE install (btrfs) and os-prober took 3:20 minutes to complete. Before today it took only few seconds. I have 2 more disks in my PC, one with a second manjaro install and the other with Windows 10. Is that normal?

TIA

#2

It can take time depending on how many disks, partitions or subvolumes you have. Note that the os-prober will mount every partition or subvolume and search for boot files.

I run this:

time sudo update-grub &>/dev/null

Result:

sudo update-grub &> /dev/null  2.20s user 1.26s system 39% cpu 8.718 total

So it took ~9sec.

#3

9 sec is OK.

Here is the output of lsblk:

NAME        MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS
loop0         7:0    0     4K  1 loop /var/lib/snapd/snap/bare/5
loop1         7:1    0  72.8M  1 loop /var/lib/snapd/snap/core22/310
loop2         7:2    0  70.4M  1 loop /var/lib/snapd/snap/core22/275
loop3         7:3    0 164.8M  1 loop /var/lib/snapd/snap/gnome-3-28-1804/161
loop4         7:4    0  55.6M  1 loop /var/lib/snapd/snap/core18/2632
loop5         7:5    0  81.3M  1 loop /var/lib/snapd/snap/gtk-common-themes/1534
loop6         7:6    0  55.6M  1 loop /var/lib/snapd/snap/core18/2620
loop7         7:7    0 114.9M  1 loop /var/lib/snapd/snap/core/14056
loop8         7:8    0 116.7M  1 loop /var/lib/snapd/snap/core/14399
loop9         7:9    0  63.2M  1 loop /var/lib/snapd/snap/core20/1634
loop10        7:10   0  91.7M  1 loop /var/lib/snapd/snap/gtk-common-themes/1535
loop11        7:11   0  63.2M  1 loop /var/lib/snapd/snap/core20/1695
loop12        7:12   0  11.9M  1 loop /var/lib/snapd/snap/nmap/2721
loop13        7:13   0  11.9M  1 loop /var/lib/snapd/snap/nmap/2864
loop14        7:14   0  17.8M  1 loop /var/lib/snapd/snap/pdftk/9
loop15        7:15   0  49.6M  1 loop /var/lib/snapd/snap/snapd/17883
loop16        7:16   0  49.6M  1 loop /var/lib/snapd/snap/snapd/17576
sda           8:0    0 465.8G  0 disk 
└─sda1        8:1    0   250G  0 part 
sdb           8:16   0 465.8G  0 disk 
├─sdb1        8:17   0     8M  0 part 
├─sdb2        8:18   0   128G  0 part /var/log
│                                     /var/cache
│                                     /home
│                                     /
├─sdb3        8:19   0    24G  0 part [SWAP]
└─sdb4        8:20   0    80G  0 part 
sr0          11:0    1  1024M  0 rom  
nvme0n1     259:0    0 953.9G  0 disk 
├─nvme0n1p1 259:1    0     8M  0 part 
├─nvme0n1p2 259:2    0    64G  0 part 
├─nvme0n1p3 259:3    0    64G  0 part 
├─nvme0n1p4 259:4    0    84G  0 part /mnt/data
├─nvme0n1p5 259:5    0    64G  0 part 
└─nvme0n1p6 259:6    0    24G  0 part

Does this justify 3+ minutes?

Also, just noticed that I have another install of arch.

TIA

#4

No idea :man_shrugging: I just explained why it takes so long.

#5

megavot is right. I have Manjaro, Garuda, Arch, and Xero installed and in each of them OS-Prober takes a while. I assumed it was cause it was because of everything it has to look at in each OS.