systemd-analyze blame: o que é dev-sda1.device?

Question

Quando executo systemd-analyse blame , esta é a saída:

          11.365s dev-sda1.device
          7.844s systemd-udevd.service
          3.603s NetworkManager.service
          2.808s keyboard-setup.service
          2.466s ModemManager.service
          2.406s accounts-daemon.service
          1.758s grub-common.service
          1.730s thermald.service
          1.469s irqbalance.service
           847ms gpu-manager.service
           813ms console-setup.service
           773ms apport.service
           702ms systemd-modules-load.service
           697ms resolvconf.service
           693ms dev-hugepages.mount
           692ms sys-kernel-debug.mount
           690ms apparmor.service
           671ms dev-mqueue.mount
           596ms systemd-tmpfiles-setup-dev.service
           594ms systemd-udev-trigger.service
           500ms systemd-journald.service
           452ms rsyslog.service
           438ms upower.service
           399ms polkitd.service
           358ms networking.service
           355ms ufw.service
           338ms avahi-daemon.service
           251ms packagekit.service
           249ms dev-disk-by\x2duuid-0830d07e\x2da7a6\x2d410b\x2da495\x2d625777b6a36e.swap
           245ms systemd-rfkill.service
           195ms systemd-logind.service
           194ms wpa_supplicant.service
           176ms kmod-static-nodes.service
           163ms udisks2.service
           162ms ondemand.service
           142ms systemd-timesyncd.service
           119ms plymouth-read-write.service
           102ms alsa-restore.service
           100ms [email protected]
            96ms [email protected]
            96ms plymouth-start.service
            87ms pppd-dns.service
            86ms systemd-journal-flush.service
            84ms systemd-tmpfiles-setup.service
            76ms systemd-update-utmp.service
            75ms systemd-tmpfiles-clean.service
            57ms snapd.autoimport.service
            56ms systemd-sysctl.service
            54ms systemd-user-sessions.service
            49ms plymouth-quit.service
            42ms snapd.socket
            40ms setvtrgb.service
            32ms systemd-remount-fs.service
            17ms rtkit-daemon.service
            16ms systemd-backlight@backlight:radeon_bl0.service
            13ms systemd-update-utmp-runlevel.service
            12ms ureadahead-stop.service
            11ms systemd-random-seed.service
             8ms sddm.service
             7ms sys-fs-fuse-connections.mount
             4ms rc-local.service
lines 35-61/61 (END)

O que é dev-sda1.device ? Qual é a sua importância? Se eu desabilitar o que vai acontecer?

Quando eu entro no meu Kubuntu, a tela inicial (Breeze) é exibida por um longo tempo