OCFS2 is a POSIX-compliant shared-disk cluster file system for Linux capable of providing both high performance and high availability. The article describes the setup procedure from the command line.
Filesystems failure can be more troubling than problems booting Linux. There can be a sign of corrupted files, misaligned blocks, troubled configuration files, or even bad hardware.
The fsck command is important as is used by Linux periodically to automatically check most of partitions on system.
The scope of the article not covers about the basic things about file system, but its about troubleshooting of corrupt file system. So, when a file system is created on hard drive it will be subdivided into multiple file system blocks. It describes what a superblock is, and what to do to recover, if a superblock is corrupted.