User`s guide

Glossary ● 64
check point
A feature that enables you to exit the ACU when an operation is in progress and be able to continue without
interruption. The driver then resumes the operation from where the BIOS left off and the BIOS resumes the
operation where the driver left off.
clear
Foreground initialization of a fault-tolerant array. A clear operation zeros all blocks of the array. The array
is not accessible until the clear task is complete.
concatenation
Joining of physical or logical drives in sequential order.
configure
Process of preparing a disk for use by the controller. When a disk is configured, the controller records the
signature on the disk.
D
disk
Physical disk drive. Randomly accessible, rewriteable data storage device. Also called hard disk.
disk ID
Unique disk identifier that consists of the channel number, SATA ID. For example, (channel:ID:LUN)
1:04:0. See channel.
drive LED
Disk indicator LED that illuminates during read or write operations.
E
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.
F
foreign disk
Disk that has previously been configured on another Adaptec SATA/SAS controller. The SATA/SAS
signature on the disk allows the SATA/SAS controller to identify whether or not the disk was configured on
the controller it is currently connected to.
H
hard disk drive
Basic unit of nonvolatile, nonremovable, magnetic storage media. See disk.
hot spare
A spare hard disk that automatically replaces a failed hard disk on any array associated with any HBA.
hot swap
To remove a component from a system, and install a new component while the power is on and the system
is running.