Troubleshooting guide

1-13
Cisco Wide Area Application Services Configuration Guide
OL-26579-01
Chapter 1 Maintaining Your WAAS System
Backing Up and Restoring your WAAS System
Caution Option 8 erases the content from all disk drives in your device.
This option performs the following steps:
a. Checks that flash memory is formatted to Cisco specifications. If yes, the system continues to
step b. If no, the system reformats the flash memory, which installs the Cisco file system, and
generates and installs a platform-specific cookie for the hardware.
b. Erases data from all drives.
c. Remanufactures the default Cisco file system layout on the disk.
d. Installs the flash memory component from the .bin image.
e. Installs the disk component from the .bin image.
Note When option 8 is used and the system reboots and begins optimizing traffic, the show disks
details command may show that the /dre1 partition is 98% or more used, due to the
preallocation of DRE cache space. Use the show statistics dre command to display the
actual DRE cache usage.
• Option 9: Exit (reboot)—This option ejects the CD-ROM (if applicable) and reboots the device. If
you are using a USB flash drive for software installation, remove it from the device before rebooting.
The following sections describe how to reinstall the WAAS system software:
• “Preparing the USB Flash Drive” section on page 1-13—Read this section if you have a WAVE
appliance that requires a USB flash drive instead of a CD to install the system software.
• “Reinstalling the System Software” section on page 1-15—Describes how to reinstall the system
software from a CD or USB flash drive.
• “Ensuring RAID Pairs Rebuild Successfully” section on page 1-18—Describes how to ensure that
RAID disks rebuild successfully.
Preparing the USB Flash Drive
If you have a WAVE appliance that requires a USB flash drive for software recovery, you must prepare
the USB flash drive with the appropriate files before you can start the software recovery process. You
will need the following:
• Windows PC (Windows XP or 7) or Mac computer
• USB flash drive that is 1 GB or larger in size
• The following software recovery files:
– WAAS Rescue CD ISO image file, which is available in the WAAS Software Download area of
Cisco.com. The filename is similar to waas-rescue-cdrom-x.x.x.x-k9.iso, where the x’s denote
the software version number. Alternatively, the ISO image file is available on the WAAS release
DVD, or you can make an ISO image file from a WAAS recovery CD.
– syslinux.cfg file, which is also available in the WAAS Software Download area of Cisco.com
and on the WAAS release DVD.
– Unetbootin utility for Windows, which is available from the Unetbootin Sourceforge website.
(This file is not needed if you are using a Mac computer to prepare the USB flash drive.)