Instruction manual

Device configuation table
A data structure containing extended information about each device connected
to the system. The DEC 3000 AXP contains are two DCTs—the kernel-resident
device configuration table, which lists information about devices that are part
of the kernel, and the TURBOchannel device configuration table, which lists
information about the TURBOchannel options that may be present in one of the
six possible option slots.
Dirty
Used in reference to a cache block in the cache of the system bus node. The cache
block is valid and has been written so that it differs from the copy in system
memory.
Dirty victim
Used in reference to a cache block in the cache of the system bus node. The cache
block is valid but is about to be replaced because of a resource conflict in a cache
block. The data must therefore be written to memory.
Ethernet
A communications concept for local communication networks that employs a
coaxial cable as a passive communications media to interconnect different kinds
of computers and information processing products. Ethernet does not require
switching logic or control by a central computer.
FEPROM
Flash-erasable programmable read-only memory.
Field-replaceable unit
Any system component that the field technician is able to replace on-site.
FRU
See field-replaceable unit.
Granularity
A characteristic of storage systems that defines the amount of data that can
be read, written, or both, with a single instruction, or read, written, or both
independently. For a given storage device, a higher granularity generally yields a
greater throughput.
Hit
Indicates that a valid copy of a memory location is currently in cache.
Icache
Instruction cache; a high-speed memory used for the storage of instructions.
LANCE
Local-area network controller for Ethernet.
Latency
The amount of time it takes for the system to respond to an event.
Glossary–2