Chapter 3 Installing the Router
If You Need More Information
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Cisco 12006 and Cisco 12406 Router Installation and Configuration Guide
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Locked Blocks in Flash Memory Cards

A locked block in Flash memory cards occurs when power is lost or a Flash
memory card is removed from its PCMCIA slot on the RP during a write or erase
operation.
When a block of Flash memory is locked, it cannot be written to or erased. Any
attempt to do so will consistently fail at the block location. The only way to
recover from locked blocks in a Flash memory card is to reformat the Flash
memory card using the format command.
Caution Formatting a Flash memory card erases all existing data on the card.
If You Need More Information
If your router is not fully functional, you may need to perform additional
configuration tasks. For more detailed information about configuring the router
and its interfaces, see the publications listed in the following section.
The Cisco IOS software running your router contains extensive features and
functionality. For information on Cisco IOS software and general installation and
maintenance information for your router, use the following resources.

Cisco IOS Software Configuration Information and Support

The modular configuration and modular command reference publications in the
Cisco IOS software configuration documentation set correspond to the Cisco IOS
software release installed on your Cisco hardware. You can also see the Cisco IOS
software release notes for the version of Cisco IOS software you are using on your
router.
You can access Cisco IOS software documentation and hardware installation and
maintenance documentation on the World Wide Web at http://www.cisco.com,
http://www-china.cisco.com, or http://www-europe.cisco.com.
If you are reading Cisco documentation on the World Wide Web, you can submit
comments electronically. Click Feedback on the toolbar, and then select
Documentation. After you complete the form, click Submit to send it to Cisco.