Adaptec 2940U - AHA Storage Controller Ultra SCSI 20 MBps Información técnica descargar pdf (Pagina 180)

166 MetaFrame Solutions Guide

4. Add the /baudrate=9600 option to Boot.ini. This forces the baud rate on the

debug COM port to 9600 bps. Always set remote debug configurations for this

option.

5. Press the PrintScreen key on the target computer console. While in debug

mode, the PrintScreen key causes the host computer to break in.

6. Make sure both modems are set to transmit break signals. For some modems, a

break signal (CTRL+C) received from the computer may cause the modem to

perform a specific task without actually transmitting the break to the remote

system. For instance, the default behavior of U.S. Robotics modems is to flush

the data buffer before sending the break signal to the remote modem. Make

sure both modems are set to pass the CTRL+C character. Consult your modem

documentation for the necessary commands. For example, to disable

destructive breaks on U.S. Robotics modems, the command is AT&Y2.

7. With the modems connected and data carrier detect present, reboot the target

computer. If the target modem is set to ignore the state of DTR, the modems

will stay connected even if the target computer is rebooted. When the kernel

loads on the target computer, it outputs information to the debug port. If the

host computer is connected at that time, this can cause the systems to

synchronize.

Failure of the Target Modem to Auto-Answer

For all Hayes-compatible modems, ATS0=1 is the command that instructs the

modem to auto-answer on one ring. The target modem must be configured with

this setting. If the target modem does not auto-answer, follow the procedure

below:

1. Move the target modem to a COM port other than the port currently being used

by the kernel debugger. If only one COM port is available on the target

computer, connect the modem to a different computer or reboot the target with

the debugger disabled.

2. Use the Terminal application (or another communications program such as

Hyperterminal) to send the ATS0=1 command to the modem. Make sure you

receive an OK response from the modem.

3. If possible, dial the number for the modem from a telephone handset to check

that it now auto-answers.

4. Save the current modem configuration in non-volatile RAM so the modem is

in auto-answer mode when it is powered up. For example, the command

AT&W saves the current modem configuration to non-volatile RAM

(NVRAM) for U.S. Robotics modems. When the debug process is finished,

restore the factory defaults by sending the AT&F command (or equivalent) to

the modem. Use the AT&W command (or equivalent) to save the factory

defaults to NVRAM.

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Adaptec 2940U - AHA Storage Controller Ultra SCSI 20 MBps Información técnica Pagina 180