Dell Adaptec U320 SCSI Raid 0 or 1 Controller Card - Manual (Page 49)

The ability of a system to keep working in the event of hardware or software faults. Fault tolerance is usually achieved
by duplicating key components of the system.
fault-tolerant arrays
Arrays that have duplicate components (RAID 1 and RAID 10).
G
Global Spare
A spare hard disk that automatically replaces a failed hard disk on any array associated with any HBA.
H
hard disk
A physical hard disk on a SCSI bus.
host adapter
Electronic circuitry that supports I/O to storage devices, but which does not support RAID.
HostRAID
Intelligent RAID on chip. Adaptec product that adds entry-level RAID functionality to SCSI ASICs and host bus
adapters.
hot spare
A hard drive, an array member, that is not used in day-to-day data storage but, instead, is reserved for use as a
replacement for one of the other drives in the array in the event of a failure.
I
initialize
Process of preparing a disk for use by the controller. When a disk is initialized, the controller records the RAID