Usb Error Handling; Gathering Additional Information; Considerations For Downgrading Firmware; Preinstallation Messages - Brocade Communications Systems 1606 Troubleshooting Manual

Gathering additional information

You should follow these best practices for firmware download before you start the procedure:
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USB error handling

The following table outlines how the USB device handles errors under specific scenarios and
details what actions you should take after the error occurs.
TABLE 9
Scenario under which download fails
An access error occurs during
firmwaredownload because the
removal of the USB device, or USB
device hardware failure, etc.
USB device is not enabled.

Considerations for downgrading firmware

The pre-installation check of the firmwareDownload command detects all of the blocking
conditions that can prevent a successful downgrade, and warns you about all these conditions. The
error messages displayed by the firmwareDownload command states the blocking conditions and
the corresponding commands to correct them. You must address all of these blocking conditions
before proceeding. Refer to the Fabric OS Administrator's Guide for more information regarding
individual features and commands.
To avoid failure of a firmware downgrade, verify the firmware you are downgrading to supports all
the blades in the chassis, and that the switch, blades, or chassis supports all the features you are
currently using. If not, you will need to disable or remove those features that are not supported.

Preinstallation messages

The messages in this section are displayed if an exception case is encountered during firmware
download. The following example shows feature-related messages that you may see if you were
upgrading from v6.1.0 to v6.3.0:
Fabric OS Troubleshoot and Diagnostics Guide
53-1001340-01
Keep all session logs.
Enter the supportSave or the supportShow command before and after entering the
firmwareDownload command.
If a problem persists, package together all of the information (the Telnet session logs and
serial console logs, output from the supportSave command) for your switch support provider.
Make sure you identify what information was gathered before and after issuing the
firmwareDownload command.
USB error handling
Cannot upgrade directly to 6.3. Please upgrade to 6.2 first and then upgrade
to 6.3.
Error handling
Firmwaredownload will timeout
and commit will be started to
repair the partitions of the CPUs
that are affected. See previous
table for details.
Firmwaredownload will fail with
an error message
USB error handling
Action
None.
Enable the USB device using the
usbStorage -e command and retry
firmwaredownload.
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