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Cisco 3600 Series Hardware Installation Guide
OL-2056-02
Chapter 5 Installing Memory in the Router
Installing and Formatting Compact Flash Memory Cards in Cisco 3631 Routers
Step 4 Reinstall the cover screws.
Step 5 Reinstall the chassis on a rack or desktop.
Step 6 Reconnect network interface cables.
Step 7 Power ON the router.
Warning
After wiring the DC power supply, remove the tape from the circuit breaker switch handle and
reinstate power by moving the handle of the circuit breaker to the ON position. To see translations
of the various warnings that appear in this publication, refer to the Regulatory Compliance and
Safety Information document that accompanied this device.
Formatting Procedures for Compact Flash Memory Cards
Cisco recommends that you format new Compact Flash memory cards to initialize them with either a
Class B Flash file system or a Class C Flash file system. This ensures proper formatting and enables the
ROM monitor to recognize and boot the Flash.
The Class B Flash file system is also known as the low end file system (LEFS).
The Class C Flash file system is similar to the standard DOS file system.
Note A Compact Flash memory card formatted with the standard DOS file system does not support booting
from the ROM monitor.
Determining the File System on a Compact Flash Memory Card
To determine the file system of a Compact Flash memory card in a Cisco 3631, enter the show flash:
command.
If the content of the Compact Flash memory card displays, the card was formatted with a Class B Flash
file system. If the geometry and format information of the card displays, the card was formatted with a
Class C Flash file system.
The following example shows output for an internal Compact Flash memory card formatted with a
Class C Flash file system:
Router# show flash:
******** ATA Flash Card Geometry/Format Info ********
ATA CARD GEOMETRY
Number of Heads: 2
Number of Cylinders 490
Sectors per Cylinder 32
Sector Size 512
Total Sectors 31360
ATA CARD FORMAT
Number of FAT Sectors 12
Sectors Per Cluster 8
Number of Clusters 3885
Number of Data Sectors 31264
Base Root Sector 152