Ubuntu Slow Boot

Last day my PC become very slow to boot.

boby@ok-pc-01:~$ systemd-analyze 
Startup finished in 15.777s (kernel) + 3min 1.400s (userspace) = 3min 17.178s
graphical.target reached after 1min 47.169s in userspace
boby@ok-pc-01:~$ 

It take 3 minutes and 17 seconds to boot up.

This happend after i did some changes to my 2nd hard disk and added ZFS partition. First thing i thought it was ZFS that make my PC slow.

systemd-analyze blame did not show any useful info.

systemd-analyze blame

To find the problem, i edited the file

sudo  vi /etc/defaults/grub

Find the line

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

Replace it with

GRUB_CMDLINE_LINUX_DEFAULT=""

Now rebuild grub.cfg with

update-grub2

Rebooted the PC. Now instead of showing Ubuntu splash screen, you get lot of text, that shows what actually your PC is doing.

From the boot message i found system waiting 1 minutes 30 seconds for mounting one of the disk partition. This is because i re-partitioned my 2nd hard disk and forget to remove the disk from /etc/fstab.

I removed the non existant disk entry from /etc/fstab and rebooted PC. Now it boot much faster.

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