HP Dynamic Root Disk (DRD) manual 4

critical file systems	The subset of file systems in a system image that will be cloned during a drd
	clone operation.
	Currently, the critical file systems are those in the LVM volume group or VxVM
	disk group containing the root (“/”) file system.
DRD	Dynamic Root Disk. The collection of utilities that manages creation, modification,
	and booting of system images.
DRD-safe	Refers to software packages for HP-UX, as well as to HP-UX commands.
	A package is DRD-safe if it can be swinstalled, swremoved, and swverified on the
	inactive system image without modifying any part of the booted system image.
	There is no requirement that the package can be configured (using swconfig) on
	the inactive system image. The package should be fully functional, either when it is
	installed on the inactive system image and the inactive system image is subsequently
	booted, or when it is installed directly to a booted system image.
	Examples of components of the booted system image that cannot be changed are the
	installed software, file systems, device configuration, process space, kernel
	definition, networking configuration, users and passwords, and auditing and
	security.
	A command is DRD-safe if it can be run in the runcmd environment without
	modifying any part of the booted system image.
hot maintenance	The ability to perform modifications to the inactive system image, using commands
	issued on the booted system image, without affecting the booted system image.
hot recovery	See recovery
inactive system	A system image that is not the booted system image. This system image can be
image	modified while the booted system image remains in production.
IPD	Installed Product Database. This is the database used by software management tools
	to keep track of what is installed on a system and information about the installed
	software state.
LVM	Logical Volume Manager. The logical volume manager (LVM), a subsystem that
	manages disk space, is supplied at no charge with HP-UX.
OE	Operating Environments are tested and integrated application bundles designed to
	work with the operating system and provide the functionality needed for your
	system’s purpose.
original system	A booted system image whose system image is cloned to create another system
environment	image. Each system image has exactly one original system environment (that is, the
	booted system image at the time the drd clone command was issued).
PSF	Product Specification File. A file created to define a software package created with
	HP Software Distributor (SD).
recovery	The ability to boot the inactive system image in the event of critical system
	problems. Also referred to as system recovery or hot recovery.
restore	The ability to retrieve user data that was previously archived.
root file system	The file system that is mounted at /.
runcmd	The environment provided by drd runcmd to isolate changes to the inactive
environment	system image.
shared file systems	The subset of file systems in a system image that will NOT be cloned during a drd
	clone operation, but will be mounted when the clone is booted.