Arch Linux

atahanacar

Member

Registered: 2015-04-10

Posts: 4

[SOLVED] Slow "dev-sda2.device" at boot...

First of all, hello everyone. This is my first post on Arch Linux forums, so don't hesitate to correct me if I am doing something wrong.

I have been trying to reduce the boot time on my HDD;
-Using readahead
-Quiet boot

I have managed to reduce the boot time dramatically, but there is a problem, which is a task on boot called dev-sda2.device and it takes more than 6 seconds

systemd-analyze

Startup finished in 1.226s (firmware) + 123ms (loader) + 5.340s (kernel) + 11.205s (userspace) = 17.895s

systemd-analyze blame

          6.283s dev-sda2.device
          1.728s systemd-readahead-collect.service
          1.728s systemd-readahead-replay.service
          1.215s wicd.service
           656ms systemd-udevd.service
           487ms systemd-fsck@dev-sda1.service
           443ms systemd-udev-trigger.service
           438ms systemd-vconsole-setup.service
           381ms systemd-sysctl.service
           380ms boot.mount
           378ms systemd-journald.service
           259ms kmod-static-nodes.service
           244ms systemd-remount-fs.service
           202ms sys-kernel-config.mount
           200ms dev-mqueue.mount
           199ms sys-kernel-debug.mount
           180ms tmp.mount
           179ms dev-hugepages.mount
           134ms systemd-tmpfiles-setup-dev.service
            64ms user@1000.service
            53ms systemd-user-sessions.service
            49ms systemd-logind.service
            43ms wpa_supplicant.service
            25ms systemd-random-seed.service
            24ms systemd-readahead-done.service
            23ms systemd-tmpfiles-setup.service
             5ms systemd-journal-flush.service
             5ms systemd-update-utmp.service
             4ms alsa-restore.service
             3ms systemd-rfkill@rfkill0.service
             2ms systemd-rfkill@rfkill3.service
             2ms systemd-rfkill@rfkill1.service
             1ms systemd-rfkill@rfkill2.service
             1ms systemd-backlight@backlight:intel_backlight.service

systemd-analyze critical-chain

graphical.target @11.205s
└─multi-user.target @11.205s
  └─wicd.service @9.989s +1.215s
    └─basic.target @9.986s
      └─sockets.target @9.985s
        └─dbus.socket @9.985s
          └─sysinit.target @9.861s
            └─systemd-update-utmp.service @9.855s +5ms
              └─systemd-tmpfiles-setup.service @9.830s +23ms
                └─local-fs.target @9.829s
                  └─boot.mount @9.447s +380ms
                    └─systemd-fsck@dev-sda1.service @8.959s +487ms
                      └─dev-sda1.device @8.959s

As you can see, dev-sda2.device takes too long and I have no idea what it is. I have been searching it for two days, and found only one topic here, which didn't help me, so I am posting this topic.

-I updated my system today.
-UEFI
-Gummiboot

I know that 17 seconds is a very fast boot, but I want to make it faster. Why not if I can?

Thanks...

EDIT: Updating the system again fixed this.

Last edited by atahanacar (2015-05-19 10:35:31)

karol

Archivist

Registered: 2009-05-06

Posts: 25,440

Re: [SOLVED] Slow "dev-sda2.device" at boot...

Did you read https://bbs.archlinux.org/viewtopic.php?id=196758 ?

atahanacar

Member

Registered: 2015-04-10

Posts: 4

Re: [SOLVED] Slow "dev-sda2.device" at boot...

Did you read https://bbs.archlinux.org/viewtopic.php?id=196758 ?

I was talking about that topic exactly.

ooo

Member

Registered: 2013-04-10

Posts: 1,638

Re: [SOLVED] Slow "dev-sda2.device" at boot...

What file system are you using, and what is the mount point for /dev/sda2?

there could be some mount options depending on your filesystem, that could slow down/speed up mounting.
depending on mount point, using x-systemd.automount option could help.

I actually have similar issue where mounting of my /home on btrfs takes 6-7s of my 18s boot time and I haven't found a solution. Most of the time I just suspend/hibernate my laptop anyway, so it's not such a big issue for myself.

atahanacar

Member

Registered: 2015-04-10

Posts: 4

Re: [SOLVED] Slow "dev-sda2.device" at boot...

/dev/sda1 is fat32 and mounted as /boot
/dev/sda2 is ext4 and mounted as /

atahanacar

Member

Registered: 2015-04-10

Posts: 4

Re: [SOLVED] Slow "dev-sda2.device" at boot...

Solved after updating the system.