I've installed oVirt Node 4.2 on one of my servers. Recently I've upgraded the kernel version to 3.10.0-957.5.1.el7.x86_64. After such update, I've rebooted the server to take effect and then the /boot partition cannot be recognized. The server then enters emergency mode and I've tried to run the command blkid but I cannot find the uuid of /boot and /boot/efi. Before reboot: # blkid /dev/mapper/onn-var_crash: UUID="2aa920d6-c2d2-4313-8df1-8be16a5718ae" TYPE="ext4" /dev/mapper/3600508b1001cede21ec59eb753184259p3: UUID="Vy9K1K-e4uI-oM73-blSV-eU29-FnZP-3FIh4Y" TYPE="LVM2_member" PARTUUID="57cfd006-60d0-4826-8f58-6d11d4e1cb94" /dev/mapper/3600508b1001cede21ec59eb753184259p1: SEC_TYPE="msdos" UUID="7408-0A3B" TYPE="vfat" PARTLABEL="EFI System Partition" PARTUUID="56cadb64-9099-4ec8-9c0c-94596c80b2a9" /dev/mapper/3600508b1001cede21ec59eb753184259p2: UUID="3e920048-3b2e-4c09-b507-c9debe7d98f0" TYPE="ext4" PARTUUID="9ee53bdd-3051-443b-960f-9801d7245d33" /dev/mapper/onn-ovirt--node--ng--4.2.7.1--0.20181219.0+1: UUID="111ed68a-a7e8-4b17-8add-5c8fd9035bbc" TYPE="ext4" /dev/mapper/onn-swap: UUID="0fcbdcfe-92da-43d4-a773-ef6f7dac0556" TYPE="swap" /dev/mapper/onn-var_log_audit: UUID="48531956-48cc-4faa-9dfc-e7baaab89b3b" TYPE="ext4" /dev/mapper/onn-var_log: UUID="15c57452-0333-4a9a-a8e6-220155e819b3" TYPE="ext4" /dev/mapper/onn-var: UUID="772613a5-be4f-4044-8b95-c846852f5421" TYPE="ext4" /dev/mapper/onn-tmp: UUID="1ee263bf-9dcb-46e8-92f7-f21a8c87eeb5" TYPE="ext4" /dev/mapper/onn-home: UUID="738d2e6f-d7e0-4d3a-acc0-6db1392a0222" TYPE="ext4" /dev/sdc: UUID="e2pRkW-V1Vd-XxqK-5PBK-5Vtb-8Mgr-YjgB1M" TYPE="LVM2_member" /dev/mapper/360060e80122ed80050402ed800000a00: UUID="e2pRkW-V1Vd-XxqK-5PBK-5Vtb-8Mgr-YjgB1M" TYPE="LVM2_member" /dev/sdd: UUID="WlBAsN-q2YR-vYGL-Syx4-HJ30-CbVk-v2Q7yt" TYPE="LVM2_member" /dev/mapper/360060e80122ed80050402ed800000a01: UUID="WlBAsN-q2YR-vYGL-Syx4-HJ30-CbVk-v2Q7yt" TYPE="LVM2_member" /dev/sde: UUID="e2pRkW-V1Vd-XxqK-5PBK-5Vtb-8Mgr-YjgB1M" TYPE="LVM2_member" /dev/sdf: UUID="WlBAsN-q2YR-vYGL-Syx4-HJ30-CbVk-v2Q7yt" TYPE="LVM2_member" /dev/mapper/c0d0ef19--826b--44d7--a380--658adb915964-master: UUID="a409bf9f-63b6-42ac-8759-038f1bc3337f" TYPE="ext3" /dev/mapper/e399fd7f--c884--4e3d--89cf--7d8ddae16058-master: UUID="887319bd-d3e4-4dfe-9f8c-3e4ee2498ccb" SEC_TYPE="ext2" TYPE="ext3" /dev/mapper/3600508b1001cede21ec59eb753184259: PTTYPE="gpt" /dev/sdb: PTTYPE="gpt" /dev/mapper/c0d0ef19--826b--44d7--a380--658adb915964-a72e9370--0649--4e6f--b10a--1015b6b2134f: PTTYPE="dos" #cat /etc/fstab /dev/onn/ovirt-node-ng-4.2.7.1-0.20181219.0+1 / ext4 defaults,discard 1 1 UUID=3e920048-3b2e-4c09-b507-c9debe7d98f0 /boot ext4 defaults 1 2 UUID=7408-0A3B /boot/efi vfat umask=0077,shortname=winnt 0 0 /dev/mapper/onn-home /home ext4 defaults,discard 1 2 /dev/mapper/onn-tmp /tmp ext4 defaults,discard 1 2 /dev/mapper/onn-var /var ext4 defaults,discard 1 2 /dev/mapper/onn-var_log /var/log ext4 defaults,discard 1 2 /dev/mapper/onn-var_log_audit /var/log/audit ext4 defaults,discard 1 2 /dev/mapper/onn-swap swap swap defaults 0 0 Any ideas what caused this?