Network Router User Manual

10-5
Cisco ONS 15530 Configuration Guide and Command Reference
78-14227-01, Cisco IOS Release 12.1(10)EV2
Chapter 10 Managing Your Cisco ONS 15530 System
Using Flash Memory
The squeeze command permanently removes files marked for deletion, and pushes all the other
undeleted files together to eliminate spaces between them. To prevent data loss due to sudden power loss,
the “squeezed” data is temporarily saved to another location in bootflash memory. The squeeze
command keeps a log of the functions performed so that if a power failure occurs, the system continues
the process when the power resumes.
Caution When deleting files from memory, be careful not to delete all the system images. If you delete all
existing system images, you can no longer boot the system from local memory.
For an example of using the delete and squeeze commands, see the “Updating with Hot-Standby
Compatible System Images” section on page 10-15.
Copying a System Image from a TFTP Server to Flash Memory
You can copy system image files from a TFTP server to Flash memory for use in booting the
Cisco ONS 15530 or for backup purposes. If the system image on internal Flash memory becomes
corrupted, you can replace the system software by copying the backup system image from the
CompactFlash card to the onboard Flash memory.
To create a backup of the system software on a TFTP server, perform the following steps:
Example
The following example shows how to copy a system image file from the default TFTP server to the
CompactFlash card:
Switch# copy tftp: disk0:
Address or name of remote host []? 172.68.16.129
Source filename []? ons15530-i-mz
Destination filename [ons15530-i-mz]? y
Command Purpose
Step 1
Switch# show {bootflash: | disk0: |
sby-disk0:}
Displays the contents of the specified Flash memory device,
including the amount of free space that is available.
If enough free space is available, skip to Step 4
Step 2
Switch# delete {bootflash: | disk0:
| sby-disk0:} filename
Deletes an old file to make room for the new file.
Step 3
Switch# squeeze bootflash: Recovers the space used by the files marked as deleted on
onboard Flash memory. This command is not necessary for
CompactFlash cards.
Step 4
Switch# copy tftp: {bootflash: |
disk0: | sby-disk0:}
Copies a file from a TFTP server to a Flash memory device.