B-2
Catalyst 3550 Multilayer Switch Software Configuration Guide
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Appendix B Working with the IOS File System, Configuration Files, and Software Images
Working with the Flash File System
Displaying Available File Systems
To display the available file systems on your switch, use the show file systems privileged EXEC
command as shown in this example:
Switch# show file systems
File Systems:
Size(b) Free(b) Type Flags Prefixes
* 16128000 11118592 flash rw flash:
16128000 11118592 unknown rw zflash:
32768 26363 nvram rw nvram:
- - network rw tftp:
- - opaque rw null:
- - opaque rw system:
- - opaque ro xmodem:
- - opaque ro ymodem:
- - network rw rcp:
- - network rw ftp:
Table B-1
show file systems Field Descriptions
Field
Value
Size(b)
Amount of memory in the file system in bytes.
Free(b)
Amount of free memory in the file system in bytes.
Type
Type of file system.
flash—The file system is for a Flash memory device.
nvram—The file system is for a nonvolatile RAM (NVRAM) device.
opaque—The file system is a locally generated pseudo file system (for example, the system) or a download
interface, such as brimux.
unknown—The file system is an unknown type.
Flags
Permission for file system.
ro—read-only.
rw—read/write.
wo—write-only.
Prefixes
Alias for file system.
flash:—Flash file system.
nvram:—NVRAM.
null:—Null destination for copies. You can copy a remote file to null to determine its size.
rcp:—Remote Copy Protocol (RCP) network server.
system:—Contains the system memory, including the running configuration.
tftp:—Trivial File Transfer Protocol (TFTP) network server.
xmodem:—Obtain the file from a network machine by using the XMODEM protocol.
ymodem:—Obtain the file from a network machine by using the YMODEM protocol.
zflash:—Read-only file decompression file system, which mirrors the contents of the Flash file system.
