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Cisco 2600 Series Routers Hardware Installation Guide
OL-2171-02
Appendix B Maintaining the Router
Installing and Formatting Compact Flash Memory Cards in Cisco 2691 Routers
Class C Flash File System (Geometry and Format Information Displayed):
Router# show flash:
******** ATA Flash Card Geometry/Format Info ********
ATA CARD GEOMETRY
Number of Heads: 8
Number of Cylinders 978
Sectors per Cylinder 32
Sector Size 512
Total Sectors 250368
ATA CARD FORMAT
Number of FAT Sectors 123
Sectors Per Cluster 8
Number of Clusters 31209
Number of Data Sectors 250080
Base Root Sector 374
Base FAT Sector 128
Base Data Sector 406
Formatting Compact Flash Memory as a Class C Flash File System
To format a new internal compact Flash memory card with a Class C Flash file system, or to remove the
files from a previously installed internal compact Flash memory card, enter the format flash: command.
The following example shows output for formatting an internal compact Flash memory card formatted
with a Class C Flash file system:
Router# format flash:
Format operation may take a while. Continue? [confirm]
Format operation will destroy all data in "flash:". Continue? [confirm]
Enter volume ID (up to 64 chars)[default flash]:
Current Low End File System flash card in flash will be formatted into DOS
File System flash card! Continue? [confirm]
Format:Drive communication & 1st Sector Write OK...
Writing Monlib sectors ...................................................................
Monlib write complete
..
Format:All system sectors written. OK...
Format:Total sectors in formatted partition:250592
Format:Total bytes in formatted partition:128303104
Format:Operation completed successfully.
Format of flash complete
Router#
Formatting Compact Flash Memory as a Class B Flash File System
To format a new internal compact Flash memory card with a Class B Flash file system (LEFS), or to
remove the files from a previously installed internal compact Flash memory card, enter the erase flash:
command.
The following example shows output for formatting an internal compact Flash memory card with a
Class B Flash file system:
Router# erase flash:
Erasing the flash filesystem will remove all files! Continue? [confirm]
Current DOS File System flash card in flash: will be formatted into Low
End File System flash card! Continue? [confirm]