Corrupted Bootflash Recovery - Cisco 9134 - MDS Multilayer Fabric Switch Troubleshooting Manual

Troubleshooting Cisco SAN-OS Software System Reboots
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
Table 2-5 Power-on or Switch Reboot Hangs (continued)
Problem

Corrupted Bootflash Recovery

All switch configurations reside in the internal bootflash. If you have a corrupted internal bootflash you
could potentially lose your configuration. Be sure to save and back up your configuration files
periodically. The regular switch boot goes through the following sequence (see
1.
2.
3.
4.
Figure 2-2
Loads kickstart image
If the images on your switch are corrupted and you cannot proceed (error state), you can interrupt the
switch boot sequence and recover the image by entering the BIOS configuration utility described in the
following section. Access this utility only when needed to recover a corrupted internal disk.
The BIOS changes explained in this section are required only to recover a corrupted bootflash.
Caution
Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x
2-14
Possible Cause
The BIOS is corrupted.
The kickstart image is corrupted.
Boot parameters are incorrect.
The system image is corrupted.
The basic input/output system (BIOS) loads the loader.
The loader loads the kickstart image into RAM and starts the kickstart image.
The kickstart image loads and starts the system image.
The system image reads the startup configuration file.
Regular Boot Sequence
Loads loader
Loads kernel,
basic drivers, and
system image
Login prompt
Chapter 2
Solution
Replace this module. Contact your customer support
representative to return the failed module.
Interrupt the boot process at the >loader prompt. Update
the kickstart image. See the
Prompt on Supervisor-2 Modules" section on page
Verify and correct the boot parameters and reboot.
Interrupt the boot process at the switch#boot prompt.
Update the system image. See the
switch(boot)# Prompt" section on page
1. BIOS
2. Loader
3. Kickstart image
4. System image
Troubleshooting Installs, Upgrades, and Reboots
"Recovery from the loader>
"Recovery from the
2-21.
Figure 2-2):
2-19.
OL-9285-05