Crash Dump Management
Software problems in the operating system (and any loaded device drivers) or hardware malfunctions can cause the operating system to stop running, or crash. The memory image (executable program and data) of the operating system when this fault occurs can be saved or dumped to disk. This crash dump can be thought of as a core dump of the operating system.
When the operating system crashes, the crash dump is written to an area of a hard disk identified as the dump device. The crash dump is written in a compressed manner to save disk space. The dump device is a raw device (not a file system) and is typically not accessible by system users. Once the crash dump is finished, the system is rebooted.
As part of the system boot, ...