Jumpers
A small piece of metal covered with plastic that enables a particular function in a hard drive when it con-
nects two pins on a jumper block.
Jumper settings
Different modes which are achieved by placing the jumper on particular pins on a device.
These modes
determine the behavior of the device. Settings are changeable by the user, but remain constant during
operation. See Jumpers.
LVD (Low Voltage Differential)
A highly compatible computer disk drive interface that is faster and more reliable than SCSI. Also known
as Ultra2SCSI.
Motherboard
Holds the computer's main processors and circuitry, and
also contains thememory, BIOS, interconnection
circuitry and expansion slots.
Multimode
A drive that can operate on an LVD bus or a Single-ended bus.
Operating system
Software that controls the execution of programs and may provide functions
such as resource allocation,
scheduling, input/output control, and data management. Although operating systems are predominantly
software, partial hardware implementations are possible.
Partition
A portion of a hard drive dedicated to a particular operating system or application and accessed as a
single logical volume.
SCSI (Small Computer System Interface)
An intelligent parallel peripheral interface characterized by its use of high level communication between
devices. Pronounced “scuzzy”.
Termination
The signals on a SCSI bus must be terminated at both ends of the bus. This is generally done by the
controller automatically and requires an “external” terminator on the last connector of the bus.
IBM storage products
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IBM Hard Disk Drive Technical Support Center version 2.0
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