HP 6-Port SATA RAID manual Records the RAID signature on the disk, Low-level format, Disks

impacted	An impacted array is one which has been created, but for some reason the initial build
	operation did not complete. All member drives are present and operational, and all data
	written to the array is protected. To optimize the array, run a Verify with Fix task.
initialize	Process of preparing a disk for use by the controller. When a disk is initialized, the controller
	records the RAID signature on the disk.
initialized array	An array that is ready for data reads and writes. Arrays can be initialized by build or clear.
legacy disk	Disk that contained a valid partition table when connected to the controller. The controller
	manages the disk as a legacy disk array where there is a one-to-one logical-to-physical
	mapping of array to disk.
logical device	Volume comprised of space from one or more physical drives and presented to the operating
	system as if it were a single storage unit.
low-level format	Process performed by the drive firmware that completely removes the file system from the disk.
mirrored	See “RAID 1” on page 18.
array/mirroring
monitoring	Process of receiving, displaying, and logging system events.
multipartition array	Array with multiple operating systems or MS-DOS partitions.
offline array	Array that can no longer be accessed.
online capacity	An array feature that enables you to add new array members at any time without losing any
expansion	data.
optimal	The state of an array when it is fully operational. For redundant arrays, the entire array is
	protected.
partition	Contiguous area of physical drive that makes up some or all of an array. When an array is
	created, space is automatically converted into partitions.
phantom object	Object that represents a component that cannot be configured by the controller management
	software; for example, a missing drive.
quick init	An array initialized using the Quick Init option is available immediately, with no on-going
	background controller activity. All data written to an array that has been quick initialized is
	protected.
RAID	Redundant Array of Independent Disks (alternative definition: Redundant Array of Inexpensive
	Disks).
RAID signature	The area on each disk reserved for use by the RAID controller.
RAID volume	Concatenates two or more arrays of the same type.
rebuild	Background regeneration of redundant data on a RAID 1 array.

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