How To Mount Logical Volumes From Redhat Rescue Mode

First boot your rescue media and scan for volume groups: # lvm vgscan -v This should find all the volume groups on your system. Then activate the volume groups: # lvm vgchange -a y You can then list the logical volumes: # lvm lvs –all You should then be able to mount one or more of the logical volumes to access it’s contents.

System Clocks in a Mixed UEFI Environment

On a UEFI enabled platform with multiple heterogenious x86-based operating systems, you can get oddball results from your system clocks if you are not careful. This is because Microsoft Windows by default instructs the hardware clock to store the time as localtime and Linux by default stores the time as UTC (Coordinated Universal Time.) Localtime is dependent on the current time zone, while UTC is a global time standard and is independent of time zone values. Though slightly different, UTC is also often known as GMT. If you are on a UEFI platform on which there is also a Microsoft

UEFI Install OEL 6.3 on Lenovo T430

I recently UEFI-installed Oracle Enterprise linux (OEL) on a Lenovo T430 that had the default Intel graphics card. In both graphical and text install modes, the OEL install screens were seriously messed up. I choose to install using the graphics mode because I am very familar with that mode from installing RHEL over the years. Other than the messed up screen, the install went smoothly. Upon rebooting OEL, the screen was still messed up. Even in text mode at run level 1, the problem persisted. However if I switched to the lasted UEK – 2.6.32-279.9.1 – the screen stablized and