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Compatible
FireWire
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Swap Benefit
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Termination
Basics
Interface
& Connector
Reference
SCSI
Connectors
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Storage Dictionary
- cache
- A small
portion of high speed memory used for temporary storage
of frequently used data. Cache reduces the time it would
take to access that data, since it no longer has to be retrieved
from the physical medium.
- CCITT
- Consultative
Committee International Telegraph and Telephone. An international
association which sets worldwide communications standards,
recently renamed International Telecommunications Union
(ITU).
- CCS
- Common
Command Set. CCS is a collection of 18 commands, which is
a subset of SCSI-1. The SCSI-1 specification allowed too
many vendor specific compatibility features; the CCS was
designed to limit choices and thus improve compatibility
between SCSI devices from different vendors. CCS became
a part of SCSI-2.
- CDB
- Command
Descriptor Block. The 6-byte, 10-byte, or 12-byte structure
used to communicate commands from a SCSI initiator to target.
- CD
- Compact
Disk. A standard medium for storage of digital data in a
machine-readable form, accessible with a laser-based reader.
CD's are 4-3/4" in diameter, and are faster and more accurate
than magnetic tape for data storage. Faster, because even
though data is generally written on a CD contiguously within
each track, the tracks themselves are directly accessible.
- CD-ROM
- Compact
Disk Read-Only Memory. A data storage system using Compact
Disk as the medium. CD-ROM's generally hold more than 600
megabytes.
- CFM
- Cubic
Feet per Minute. A measurement of airflow.
- channel
- An
interface directed toward high speed transfer of large amounts
of information. A general term for a path on which electronic
signals travel.
- character
- A single
letter, digit or punctuation symbol, equivalent to one byte.
- character
device
- A printer
or other peripheral device that sends or receives data character
by character, rather than in bursts of data.
- coaxial
cable
- A cable
made from a single copper wire clad with insulation and
a shield, through which information is transmitted as electrical
pulses. Used for high-speed transmission over short distances.
- CIFS
(Common Internet File System)
- Developed
by Microsoft as a remote file system access protocol for
use over the Internet. Remote file systems don't have to
be mounted but can be referred to by globally significant
names.
- command
- An
instruction transferred from SCSI Initiator to SCSI Target,
typically containing function codes, an address, flags,
and possibly other information.
- command
queue
- Refers
to the queue used to store queued I/O processes.
- configuration
- The
collection of a systems software or hardware components
and operating parameters.
- connect
- Function
that occurs when a SCSI Initiator selects a SCSI Target
to start an operation, or SCSI Target reselects a SCSI Initiator
to continue an operation.
- contingent
allegiance
- A condition
typically indicated by a Check Condition status during which
a SCSI Target preserves sense data (information about failure
or a specific condition) to be received by the corresponding
SCSI Initiator.
- control
signals
- Set
of 9 lines used to put the SCSI bus into its different phases.
A combination of asserted and negated control signals define
the SCSI phases.
- Controller
- The
electronic circuit board or system that controls a peripheral
device.
- CRC
- Cyclic
Redundancy Check. An error detection scheme in which the
block check character is generated by dividing all the data
in a transmission block by a predetermined number.
- crosstalk
- Unwanted
transmission of energy from one circuit to another adjacent
circuit.
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