Troubleshooting guide

1-18
Cisco Wide Area Application Services Configuration Guide
OL-26579-01
Chapter 1 Maintaining Your WAAS System
Backing Up and Restoring your WAAS System
After the module reboots, it is running the newly installed WAAS software.
Ensuring RAID Pairs Rebuild Successfully
You must ensure that all RAID pairs are done rebuilding before you reboot your WAE device. If you
reboot while the device is rebuilding, you risk corrupting the file system.
RAID pairs will rebuild on the next reboot after you use the restore factory-default command, replace
or add a hard disk drive, delete disk partitions, or reinstall WAAS from the booted recovery CD-ROM
or USB flash drive.
To view the status of the drives and check if the RAID pairs are in “NORMAL OPERATION” or in
“REBUILDING” status, use the show disk details EXEC command. When you see that RAID is
rebuilding, you must let it complete that rebuild process. This rebuild process can take several hours.
If you do not wait for the RAID pairs to complete the rebuild process before you reboot the device, you
may see the following symptoms indicating a problem:
• The device is offline in the Central Manager GUI.
• CMS can not be loaded.
• Error messages say that the file system is read-only.
• The syslog contains errors such as “Aborting journal on device md2,” “Journal commit I/O error,”
“Journal has aborted,” and “ext3_readdir: bad entry in directory.”
• Other unusual behaviors related to disk operations or the inability to perform them.
If you encounter any of these symptoms, reboot the WAE device and wait until the RAID rebuild finishes
normally.
Recovering the System Software
WAAS devices have a resident rescue system image that is invoked if the image in flash memory is
corrupted. A corrupted system image can result from a power failure that occurs while a system image
is being written to flash memory. The rescue image can help you download a system image to the main
memory of the device and write it to flash memory.
Note The system image used depends on your device. For all WAVE and WAE-674/7341/7371 devices
(64-bit platforms), use the 64-bit system image (with “x86_64” in its name). For all other
devices, use the 32-bit system image named without this designator.
An NPE image is provided that has the disk encryption feature disabled for use in countries
where disk encryption is not permitted.
To install a new system image using the rescue image, follow these steps:
Step 1 Download the system image file (*.sysimg) to a host that is running an FTP server.
Step 2 Establish a console connection to the WAAS device and open a terminal session.
Step 3 Reboot the device by toggling the power on/off switch.