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Erasing Files from a Full Boot Flash Memory SIMM
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The following is a review of tasks you should have completed during hardware installation, including starting up the switch router. These tasks must be completed before proceeding with configuring your switch router.

Note - When boot flash memory is full, it is important to first make a copy of a known good image file, and then copy a new system image file. In case the new image file you copy from the TFTP server is corrupted, you can revert to the copy of the known good system image file. For a detailed example on how to first make a copy of a known good image file, and then copy a new system image file, refer to the "Copying the System Image to the Switch Router" section

Use the following commands to first erase and clean boot flash memory and then copy the new system image from the TFTP server to boot flash memory beginning in privileged EXEC mode:

Command Purpose

Step 1 

Router#dir bootflash:

Displays the contents of boot flash memory, including the names of the images that currently reside there.

Step 2 

Router#copy tftp: bootflash:

Erases boot flash memory and copies a file from a TFTP server to boot flash memory.

The following example demonstrates how to first erase and clean boot flash memory and then copy the new system image from the TFTP server to the boot flash memory SIMM.

Router# dir bootflash:  
Directory of bootflash:/ 1 -rw- 3168032 pci-fix
2 -rw- 1858797 domino-diag.f1
3 -rw- 3166692 cat2948g-in-mz.120-7.WX5.14.27
4 -rw- 3172268 cat2948g-in-mz.120-7.W5.14.42
5 -rw- 3173128 cat2948g-in-mz.120-7.W5.14.45
16777216 bytes total (2237976 bytes free)
Router# copy tftp bootflash:
Address or name of remote host []? 172.10.00.00
Source filename []? domino/cat2948g-in-mz.120-7.W5.14.46
Destination filename [cat2948g-in-mz.120-7.W5.14.46]?
Accessing tftp://172.10.00.00/domino/cat2948g-in-mz.120-7.W5.14.46...
Erase bootflash: before copying? [confirm] yes
Erasing the bootflash filesystem will remove all files! Continue? [confirm] yes
Erasing device... eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
eeeeeeeeeeeee
eeeeeee ...erased
Erase of bootflash: complete
Loading domino/cat2948g-in-mz.120-7.W5.14.46 from 172.10.00.00
(via FastEthernet
1): !!.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!
!!!!!
[OK - 3173128/6345728 bytes]
Verifying checksum... OK (0x799F)
3173128 bytes copied in 177.668 secs (17927 bytes/sec)
Router# dir bootflash:
Directory of bootflash:/

1 -rw- 3173128 cat2948g-in-mz.120-7.W5.14.46

16777216 bytes total (13604024 bytes free)

Note - To erase a full boot flash, enter yes when you are prompted to confirm erasing boot flash.