HP 6-Port SATA RAID manual Degraded, Array to fail and result in data loss, Drive, Failover drive

degraded	A redundant array (for example, a RAID 1 array) in which one or more members have failed.
	The data is intact, but redundancy has been compromised. Any further failure would cause the
	array to fail and result in data loss.
dirty data	Data that has been written to a cache, but which has not been flushed out to its final
	destination.
disk	A nonremovable platter in a hard drive, or removable media used in a CD drive, floppy disk
	drive, or Zip drive. See also disk ID, drive, and hard disk, hard drive.
disk ID	Unique disk identifier that consists of the channel number, ID, and LUN (channel:ID:LUN), for
	example, 1:04:0. See also channel.
drive	Device used for storing data. May contain one or more removable or nonremovable, writable,
	or read-only media. See also hard disk, hard drive.
drive LED	Indicator light that illuminates during read or write operations.
event	Notification or alert from the system, indicating that a change has occurred.
event log	File used to maintain information about prior controller activities or errors.
event notification	Process for transmitting events.
failed	State of a nonredundant array that has suffered a single drive failure, or a redundant array
	that has suffered multiple drive failures. A failed array is inaccessible and data is lost.
failed partition	A partition that is no longer usable by an array because it is either logically bad and therefore
	no longer needed, or physically damaged.
failover drive	See hotspare.
fault-tolerant array	Refers to an array that can continue to function after a disk drive failure without loss of data.
	See also redundant.
foreign disk	Disk that has previously been initialized on another SATA RAID controller. The RAID signature
	on the disk allows the controller to identify whether or not the disk was initialized on the
	controller to which it is currently connected.
free space/partition	See available space/partition.
hard disk, hard	Basic unit of nonvolatile, nonremovable, magnetic storage media. See also drive.
drive
hot plug, hot swap	To remove a component from a system and install a new component while the power is on
	and the system is running.
hotspare	A hard drive that is present as an array member, but which is not used in day-to-day data
	storage. Instead, it is reserved for use as an automatic replacement drive if any of the other
	drives in the array fail. There are two types of hotspares: Global hotspares protect every array
	that they have enough capacity to protect, while dedicated hotspares protect only the array to
	which they are assigned.

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