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AppendixC Using the CompactFlash Disk
Product Description
Product Description
CompactFlash Disks are designed with Flash technology, a nonvolatile storage solution that does not
require a battery to retain data indefinitely. CompactFlash Disks provide complete PCMCIA-ATA
functionality and compatibility as defined by the CompactFlash Association in their CF+ and
CompactFlash Specification, revision 1.4.
The CompactFlash Disk is more flexible than linear Flash memory because the CompactFlash Disk has
controller circuitry that allows it to emulate a hard disk and automatically maps out bad blocks and
performs automatic block erasure. Further, the CompactFlash Disk provides the capability to allocate
noncontiguous sectors, which eliminates the need for the squeeze command (previously required with
linear Flash memory cards).
The CompactFlash Disk provides increased Flash-based memory space—64 MB to 128 MB—for
storage of system configuration files, Cisco IOS software images, and other types of system-related files.
Table C -1 provides memory information for the CompactFlash Disk.
Note The CompactFlash Disk is only supported on systems with the Cisco IOS File System feature, and the
Cisco IOS File System feature is supported in Cisco IOS Release 12.0 (1) o r later rele as es of 12 .0. In
general, CompactFlash Disk functionality requires Cisco IOS Release 12.0(2) or a later release of 12.0.
The CiscoI OS File System feature provides a single interface to all file systems your system uses:
•Flash memory file systems—CompactFlash Disks and onboard Flash memory
•Network file systems—File Transfer Protocol (FTP), Remote Copy Protocol (rcp), and TFTP
•Any other endpoint for reading or writing data—NVRAM, the runnin g configura tion, ROM, raw
system memory, system bundled microcode, Xmodem, Flash load helper log, modems, and BRI
MUX interfaces
Note A complete discussion of the Cisco IOS File System feature is beyond the scope of this publication. For
information about this feature, refer to the Cisco IOS Configuration Fundamentals Configuration Guide
and Cisco IOS Configuration Fundamentals Command Reference publications for CiscoIOS Release
12.x. These publications are available on Cisco.com. (For information on how to access Cisco.com, see
the “Cisco.com” section on page xvii.)
TableC-1 CompactFlash Disk Memory Options
Memory Size Product Number
64 MB MEM-COMP-FLD64M=
128 MB MEM-COMP-FLD128M=