Oracle Exadata X5-2 Service Manual page 212

BIOS Advanced Menu Selections
Setup Options
Bits per Second
Data Bits
Parity
Stop Bits
Flow Control
212 Oracle Exadata Storage Server X5-2 High Capacity Service Manual • January 2018
Options Defaults
9600 9600
19200
38400
57600
115200
7/8 8
None/Even/Odd/Mark/ None
Space
1/2 1
None, Hardware RTS/ None
CTS, Software Xon/Xoff
Description
Select the serial port
transmission speed. The
speed must be matched
on the connecting serial
device. Long or noisy lines
require lower speeds.
Select the data bits.
A parity bit can be sent
with the data bits to detect
some transmission errors.
■ None: No parity bits
are sent.
■ Even: Parity bit is 0 if
the number of 1s in the
data bits is even.
■ Odd: Parity bit is 0 if
the number of 1s in the
data bits is odd.
■ Mark: Parity bit is
always 1.
■ Space: Parity bit is
always 0.
Mark and Space parity
do not allow for error
detection. They can be
used as an additional data
bit.
Stop bits indicate the end
of a serial data packet.
(A start bit indicates the
beginning of a serial data
packet.) The standard
setting is 1 stop bit.
Communication with slow
devices may require more
than 1 stop bit.
Flow control can prevent
data loss from buffer
overflow. When sending
data, if the receiving
buffers are full, a 'stop'
signal can be sent to stop
the data flow. Once the
buffers are empty, a 'start'
signal can be sent to restart
the flow. Hardware flow