IOS invalid image..

From: Maljure, Sanjay (smaljure@xxxxxxxxxxxxxxxxx)
Date: Fri Sep 15 2000 - 22:40:33 GMT-3


   
Hi All
I am trying to copy an IOS image to the flash of a router. I have tried it
several times now. From different sources (including another router's flash)
and everytime, I get the same error message :

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
[OK - 8124000/8388608 bytes]

Verifying checksum... invalid (expected 0x748A, computed 0xEAD8)
Flash copy took 0:05:52 [hh:mm:ss]
r8(boot)#
r8(boot)#sh flash

System flash directory:
File Length Name/status
  1 8124000 c2500-js-l_112-19.bin [invalid checksum]
[8124064 bytes used, 264544 available, 8388608 total]
8192K bytes of processor board System flash (Read/Write)

r8(boot)#

The size of the file matches perfectly with the file size in the source
location. But everytime the checksum is failing. Could this be a faulty
flash???? BTW I haven't played around with this router before and hence
never personally seen it boot good from an IOS on the flash.

Please help. What could be causing it?

Thanks
Sanjay



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