Oracle EXADATA X5-2, Руководство по обслуживанию

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BIOS Advanced Menu Selections
Setup Options Options Defaults Description
Bits per Second 9600
19200
38400
57600
115200
9600 Select the serial port
transmission speed. The
speed must be matched
on the connecting serial
device. Long or noisy lines
require lower speeds.
Data Bits 7/8 8 Select the data bits.
Parity None/Even/Odd/Mark/
Space
None 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 1/2 1 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 None, Hardware RTS/
CTS, Software Xon/Xoff
None 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
212 Oracle Exadata Storage Server X5-2 High Capacity Service Manual • January 2018