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Enabling debug output

To enable debug output from a Terminal session:

1. Enter the sudo nvram atto-args-celerityfc=“-e 0xff” command.

If you are not the root user, you will be prompted for an administrator password.

2. Reboot the system for the changes to take effect.

3. Enter the nvram –p command to verify the change.

Collecting debug output

The Celerity FC host adapter driver does not use the system log to communicate driver events because

it has limited resources. To ensure that you can view events, the driver logs them internally.

You can retrieve logs using the ATTOCelerityFCLog utility, available in /System/Library/

Extensions/ATTOCelerityFCUtils (Figure 28).

To retrieve a log for support analysis:

1. After reproducing the issue, launch ATTOCelerityFCLog.

2. Copy and paste the output into a TextEdit file.

3. Save the file and forward it to the designated support channel.

Figure 28 ATTOCelerityFCLog example

ATTO Celerity IORegistry

The IORegistry provides useful troubleshooting information about installed devices (Figure 29).

To retrieve an IORegistry report for support analysis, enter IOREG.command from /System/

Library/Extensions/ATTOCelerityFCUtils.

Troubleshooting the Celerity FC host adapter56

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Mpio DMG Manuel de service Page 56