It appears I accidentally renamed my main logical volume and now RHEL58 machine cannot boot normally. The original logvolume names were VolGroup00 and LogVol01, LogVol02, etc. The last command I used was
vgrename -t VolGroup00 SysVolume
which should not change records but should only make and keep the change during the current session (if this is correct understanding). Then I rebooted to erase any modifications. However, this is what I got upon reboot:
Reading all physical volumes. This may take a while...
Found volume group "SysVolume" using metadata type lvm2
Volume group "VolGroup00" not found
Unable to access resume device (/dev/VolGroup00/LogVol01
mount: could not find filesystem '/dev/root'
setuproot: moving /dev failed: No such file or directory
setuproot: error mounting /proc: No such file or directory
setuproot: error mounting /sys: No such file or directory
setuproot: mount failed: No such file or directory
Kernel panic - not syncing: Attempted to kill init!
I guess I need to rename SysVolume back to LogVolume00, but I do not know how from the point the the system is stuck at, or how to proceed after logging in with a rescue disc or liveDVD. Please advise...