AFTER REBOOT THE SYSTEM LOCAL LVM'S ARE MISSING (root file systems)

Usually we could see this issue when we reboot the server after the OS upgrade. we couldn't see the local root files systems  like /tmp /boot /var etc... or we could see from console like /dev/mapper/vg00-lvhome missing

Then you can give a try with below commands which will fix the issue.

the the below command

# mount –n –o remount,rw /

Then run the vgscan

# lvm vgscan

This should report finding the volume group vg00

Then run below command

 #mount –n –o remount,ro /

then rebooot the server again

 #reboot

after server is up you can see file systems using below command

# df -h