我在一台 Acer 笔记本电脑上运行 Kubuntu 18.04，与 Windows 10 进行双启动。/dev/sda6 是我的根分区。启动需要将近一分钟，我不知道这是否正常。这是 systemd-analyze 的输出
systemd-analyze
Startup finished in 7.391s (kernel) + 45.645s (userspace) = 53.037s
graphical.target reached after 45.633s in userspace
这是 systemd-analyze blame 的输出
26.767s dev-sda6.device
24.284s systemd-journal-flush.service
16.950s systemd-udevd.service
8.744s systemd-sysctl.service
7.549s NetworkManager-wait-online.service
6.793s systemd-tmpfiles-setup-dev.service
6.222s mpd.service
4.040s udisks2.service
4.018s accounts-daemon.service
3.775s ModemManager.service
3.627s NetworkManager.service
3.410s systemd-modules-load.service
3.406s snapd.service
2.778s networkd-dispatcher.service
2.357s keyboard-setup.service
1.879s thermald.service
1.728s apt-daily.service
1.683s polkit.service
1.673s grub-common.service
1.323s gpu-manager.service
1.178s plymouth-start.service
1.123s systemd-remount-fs.service
1.016s dev-mqueue.mount
1.012s sys-kernel-debug.mount
1.005s dev-hugepages.mount
904ms systemd-random-seed.service
847ms systemd-fsck@dev-disk-by\x2duuid-41222b08\x2d9cb8\x2d4c87\x2d9a05\x2ddaede635edc4.service
787ms avahi-daemon.service
780ms ufw.service
754ms wpa_supplicant.service
706ms apport.service
705ms bluetooth.service
703ms pppd-dns.service
701ms rsyslog.service
679ms lm-sensors.service
669ms systemd-fsck@dev-disk-by\x2duuid-A465\x2d76D5.service
648ms systemd-logind.service
488ms systemd-tmpfiles-setup.service
478ms kmod-static-nodes.service
421ms apparmor.service
397ms systemd-journald.service
251ms plymouth-read-write.service
245ms packagekit.service
244ms colord.service
219ms setvtrgb.service
182ms systemd-udev-trigger.service
182ms upower.service
165ms systemd-timesyncd.service
162ms systemd-resolved.service
113ms [email protected]
112ms systemd-rfkill.service
83ms boot-efi.mount
76ms plymouth-quit.service
66ms systemd-update-utmp.service
64ms rtkit-daemon.service
62ms snapd.socket
59ms dev-disk-by\x2duuid-613933e2\x2dc62c\x2d4293\x2daf60\x2d73e3507c20cc.swap
55ms home.mount
42ms systemd-tmpfiles-clean.service
20ms alsa-restore.service
20ms snapd.seeded.service
16ms kerneloops.service
9ms systemd-update-utmp-runlevel.service
9ms ureadahead-stop.service
7ms systemd-backlight@backlight:amdgpu_bl0.service
5ms systemd-user-sessions.service
5ms sys-kernel-config.mount
5ms console-setup.service
4ms sddm.service
4ms sys-fs-fuse-connections.mount
我已经按照说明解决了 apt-daily.service 的问题这里，但还有一个服务耗时较长，dev-sda6.device。systemd-journal-flush.service 耗时也相当长。
我能做什么吗？还是我的硬盘坏了？（反正硬盘是新的）
可能sudo journalctl --vacuum-time=5d会改变一些事情？