Arch Linux

cmonty14

Member

Registered: 2019-10-05

Posts: 58

Watiing 90sec using a LUKS encrypted partition to display Grub

Hello,

I have installed Linux OS on a laptop that is running Windows.
That means I now have a dual-boot setup with Grub2 using BIOS with MBR.

In addition I encrypted this linux partitoin with LUKS1.

As a result I have a simple disk layout with 4 partitions:

Device     Boot     Start       End   Sectors   Size Id Type
/dev/sda1  *         2048   2459647   2457600   1,2G  7 HPFS/NTFS/exFAT
/dev/sda2         2459648 369705747 367246100 175,1G  7 HPFS/NTFS/exFAT
/dev/sda3       369707008 371097599   1390592   679M 27 Hidden NTFS WinRE
/dev/sda4       371097600 488396799 117299200  55,9G 83 Linux

When I turn on this laptop, I can see this on screen:

GRUB loading...
Welcome to GRUB!

And I line that requests to enter a password for the encypted partiton.

After hitting ENTER key I get the Grub menu and can boot either Windows or Linux OS.

Technically the boot process works, however the wait time after hitting ENTER until Grub menu is displayed is ~90sec.

I didn't expect that decrypting partition /dev/sda4 would take ~90sec.

What is the explanation for this long waittime?

THX