B-2
Cisco 3900 Series, Cisco 2900 Series, and Cisco 1900 Series Integrated Services Routers Generation 2 Software Configuration Guide
Appendix B Using CompactFlash Memory Cards
Online Insertion and Removal
Online Insertion and Removal
Online insertion and removal (OIR) is a feature that allows you to replace CF memory cards without
turning off the router and without affecting the operation of other interfaces. OIR of CF memory cards
provides uninterrupted operation to network users, maintains routing information, and ensures session
preservation.
Caution
The external CF memory card should not be removed if the flash memory busy “CF” LED on the router
is blinking, because this indicates that the software is accessing the CF memory card. Removing the CF
memory card may disrupt the network, because some software features use the CF memory card to store
tables and other important data.
For instructions on inserting, removing, and replacing the external CF memory card, see the hardware
installation guide for your router.
How to Format CompactFlash Memory Cards
This section contains the following procedures:
•
Determining the File System on a CompactFlash Memory Card, page B-2
•
Formatting CompactFlash Memory as a Class C File System, page B-3
Determining the File System on a CompactFlash Memory Card
To determine the file system of a CF memory card, enter the
show flash: all
command in privileged
EXEC mode.
•
If geometry and format information does not appear in the output, the card is formatted with a
Class B flash file system. Class B files systems are not supported on CF inserted in Cisco 3900
Series, 2900 Series, and 1900 Series Integrated Services Routers.
•
If geometry and format information appears in the output, the card is formatted with a Class C flash
file system.
The following examples show sample outputs for Class B and Class C flash file systems.
Note
Use
flash1:
in the command syntax to access CF in slot1. Use
flash0:
in the command syntax
to access CF in slot0.
Table B-1
Compact Flash Slot Numbering and Naming
Slot Number
CF Filenames
Size
1
1.
The maximum storage capacity for the CF in Slot0 and Slot1 is 4GB.
Slot0
2
2.
Slot 0 is the default CF slot. CF in slot0 can store system image, configuration, and data files. CF must be present in this slot
for the router to boot and perform normal file operations.
flash0:
256MB
Slot1
flash1:
0