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Glossary
controller to "rebuild" the data on the new drive, all without interrupting
system operations. Once the rebuild is complete, the controller will be
brought back into a fault tolerant state. See also Hot Swap.
Hot Spare
A physical disk drive not part of a system drive that the controller can use to
automatically rebuild a critical system drive. The hot spare drive must have
at least as much capacity as the largest disk drive in the array or the rebuild
may not start. See also Hot Standby.
Hot Standby
A redundant component in a fault tolerant storage system that has power
applied and is ready to operate, but which does not perform its task as long
as the primary component for which it is standing by is functioning properly.
See also Hot Replacement of Disk and Hot Spare.
Hot Swap
The exchange of a replacement unit in a storage system for a defective unit.
The exchange requires human intervention, but the system can continue to
perform its normal functions (compare with Auto Swap, Cold Swap, and
Warm Swap). See also Hot Replacement of Disk.
In-Line Terminator
A plug attached to the end of a SCSI cable in order to initiate active
termination. Used when SCSI devices on the cable do not have built-in
termination. See also Active Termination.
Interface
A hardware or software protocol that manages the exchange of data between
the hard disk drive and the computer. The most common interfaces for small
computer systems are ATA (also known as IDE) and SCSI.
Internal RAID Controller
A controller circuit board that resides inside a computer or server. An
internal RAID controller resides on a bus, such as the PCI bus. Examples of
internal RAID controllers include the Mylex AcceleRAID and
eXtremeRAID families.
Manual No. 775051
G-9
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