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paritykontroller

Paritykontroller, or parity controller, is a device or software component that manages parity data used for error detection and, in some architectures, error correction in digital systems. Its primary function is to compute parity bits for outgoing data, verify incoming data by comparing it with stored parity, and raise errors or initiate data reconstruction when a mismatch is detected.

In storage and data communication, parity is commonly implemented as a simple XOR of corresponding bits across

Paritetskontrollerapplikationer appear in multiple domains. In memory systems, parity checking is used to detect single-bit errors,

Historically widespread in early data integrity schemes, paritykontroller functionality remains common in modern storage controllers and

a
data
block.
Paritykontrolleren
can
be
realized
as
hardware
within
a
RAID
controller,
as
part
of
a
disk
interface,
or
as
software
in
the
operating
system.
In
RAID
configurations
such
as
RAID-4
and
RAID-5,
parity
information
is
distributed
or
centralized
to
allow
recovery
of
a
failed
disk
by
reconstructing
the
missing
data
from
the
parity
and
surviving
blocks.
RAID-6
extends
this
capability
with
two
independent
parity
schemes
for
greater
fault
tolerance.
while
in
network
and
serial
communications
parity
bits
help
detect
transmission
errors.
While
parity
can
detect
certain
error
patterns,
it
cannot
correct
all
error
types
by
itself
and
does
not
protect
against
multiple
simultaneous
bit
errors
without
additional
error-correcting
codes
(ECC)
or
more
elaborate
schemes.
high-reliability
systems.
Related
concepts
include
parity
bit,
error
detection
and
correction,
ECC,
and
various
RAID
levels.