[mkreine]

Добавлю:

в boot.log такое:

boot.log

[ TIME ] Timed out waiting for device dev-mapper-centos_192\x2dswap.device.
[DEPEND] Dependency failed for /dev/mapper/centos_192-swap.
[DEPEND] Dependency failed for Swap.
[FAILED] Failed to start udev Wait for Complete Device Initialization.
See 'systemctl status systemd-udev-settle.service' for details.

далее...

systemctl status systemd-udev-settle.service

[root@localhost log]# systemctl status systemd-udev-settle.service
● systemd-udev-settle.service - udev Wait for Complete Device Initialization
Loaded: loaded (/usr/lib/systemd/system/systemd-udev-settle.service; static; vendor preset: disabled)
Active: failed (Result: exit-code) since Вт 2018-06-26 16:04:55 CEST; 19min ago
Docs: man:udev(7)
man:systemd-udevd.service(8)
Process: 530 ExecStart=/usr/bin/udevadm settle (code=exited, status=1/FAILURE)
Main PID: 530 (code=exited, status=1/FAILURE)

июн 26 16:02:54 localhost.localdomain systemd[1]: Starting udev Wait for Complete Device Initialization...
июн 26 16:04:55 localhost.localdomain systemd[1]: systemd-udev-settle.service: main process exited, code=exited, status=1/FAILURE
июн 26 16:04:55 localhost.localdomain systemd[1]: Failed to start udev Wait for Complete Device Initialization.
июн 26 16:04:55 localhost.localdomain systemd[1]: Unit systemd-udev-settle.service entered failed state.
июн 26 16:04:55 localhost.localdomain systemd[1]: systemd-udev-settle.service failed.
[root@localhost log]#

что вообще происходит? если я его перезагружу, он перезагрузится нормально?

И ещё в логах такое есть (приведен только фрагмент, это отображалось при загрузке):

^[[0m^[[31m* ^[[0m] (1 of 2) A start job is running for udev Wait for Complete Device Initialization (11s / 2min 54s)
^[[K[^[[1;31m*^[[0m^[[31m* ^[[0m] (1 of 2) A start job is running for udev Wait for Complete Device Initialization (12s / 2min 54s)
^[[K[^[[31m*^[[1;31m*^[[0m^[[31m* ^[[0m] (1 of 2) A start job is running for udev Wait for Complete Device Initialization (12s / 2min 54s)
^[[K[ ^[[31m*^[[1;31m*^[[0m^[[31m* ^[[0m] (2 of 2) A start job is running for dev-mapper-centos_192\x2dswap.device (19s / 1min 30s)
^[[K[ ^[[31m*^[[1;31m*^[[0m^[[31m* ^[[0m] (2 of 2) A start job is running for dev-mapper-centos_192\x2dswap.device (19s / 1min 30s)
^[[K[ ^[[31m*^[[1;31m*^[[0m^[[31m*^[[0m] (2 of 2) A start job is running for dev-mapper-centos_192\x2dswap.device (20s / 1min 30s)
^[[K[ ^[[31m*^[[1;31m*^[[0m] (1 of 2) A start job is running for udev Wait for Complete Device Initialization (14s / 2min 54s)
^[[K[ ^[[31m*^[[0m] (1 of 2) A start job is running for udev Wait for Complete Device Initialization (15s / 2min 54s)
^[[K[ ^[[31m*^[[1;31m*^[[0m] (1 of 2) A start job is running for udev Wait for Complete Device Initialization (15s / 2min 54s)
^[[K[ ^[[31m*^[[1;31m*^[[0m^[[31m*^[[0m] (2 of 2) A start job is running for dev-mapper-centos_192\x2dswap.device (22s / 1min 30s)
^[[K[ ^[[31m*^[[1;31m*^[[0m^[[31m* ^[[0m] (2 of 2) A start job is running for dev-mapper-centos_192\x2dswap.device (22s / 1min 30s)
^[[K[ ^[[31m*^[[1;31m*^[[0m^[[31m* ^[[0m] (2 of 2) A start job is running for dev-mapper-centos_192\x2dswap.device (23s / 1min 30s)
^[[K[^[[31m*^[[1;31m*^[[0m^[[31m* ^[[0m] (1 of 2) A start job is running for udev Wait for Complete Device Initialization (17s / 2min 54s)

[Jula0071]

mkreine, у диска состояние поганенькое. Очень много для его возраста 193 Load_Cycle_Count 0x0032 084 084 000 Old_age Always - 164677, также 187 Reported_Uncorrect 0x0032 100 100 000 Old_age Always - 65536 (последняя цифра очень не нравится круглостью - счётчик переполнился?) и 192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always - 983055 нехорошо.

Диск я бы заменил, причём, на SSD. Бекапы есть?

По логической структуре, судя по всему, вы используете LVM, ну вот и покажите выхлоп команд pvs, vgs, lvs. Ну и содержимое /etc/fstab

[mkreine]

Скрытый текст

[root@localhost kis]# pgs
bash: pgs: команда не найдена...
[root@localhost kis]# vgs
VG #PV #LV #SN Attr VSize VFree
centos_192 1 3 0 wz--n- 930,31g 4,00m
[root@localhost kis]# lgs
bash: lgs: команда не найдена...
[root@localhost kis]#

/etc/fstab

[root@localhost kis]# cat /etc/fstab

#
# /etc/fstab
# Created by anaconda on Thu Mar 8 12:09:33 2018
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/centos_192-root / xfs defaults 0 0
UUID=75cdb1e7-d2d9-49f4-a8ce-2f6b84b36641 /boot xfs defaults 0 0
UUID=DBAD-78F5 /boot/efi vfat umask=0077,shortname=winnt 0 0
/dev/mapper/centos_192-home /home xfs defaults 0 0
/dev/mapper/centos_192-swap swap swap defaults 0 0
[root@localhost kis]#

Что, прям так срочно заменять?

[DVDshnik]

Менять как можно скорее.