Cisco Systems 3631 Manual De Usuario

The following sections describe formatting procedures for internal and external CompactFlash memory 
cards.

Cisco recommends that you erase (Class B) or format (Class C) new CompactFlash memory cards to 
initialize them with either a Class B or 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.

A CompactFlash memory card formatted with the standard DOS file system does not support booting 
from the ROM monitor. 

To determine the file system of an external CompactFlash memory card, enter the show slot0: all 
command. To determine the file system of an internal CompactFlash memory card, enter the 
show flash: all command. 

If geometry and format information is not displayed, the card is formatted with a Class B Flash file 
system. 

If geometry and format information is displayed, the card is formatted with a Class C Flash file 
system. 

The following examples show outputs for Class B and Class C Flash file systems:

Router#show slot0: all

Partition   Size    Used      Free      Bank-Size  State          Copy

Mode

  1        31360K   6502K    24857K        0K      Read/Write     Direct

Slot0 CompactFlash directory:

File  Length   Name/status

        addr      fcksum  ccksum

  1   6658376  c3725-i-mz

        0x40      0xE0FF  0xE0FF

[6658440 bytes used, 25454200 available, 32112640 total]

31360K bytes of ATA Slot0 CompactFlash (Read/Write)

 Chip information NOT available.