[c-nsp] SUP2 boot problem

[Jonas]

Hello,

Im trying to upgrade an old SUP2.
I can boot 12.1.27 from bootflash: without problem.
When I do reload from IOS with 12.2.18 and boot from disk0: it will give 
the error below and stay i rommon. disk0: is a 64MB flash disk.



System Bootstrap, Version 7.1(1)
Copyright (c) 1994-2001 by cisco Systems, Inc.
c6k_sup2 processor with 262144 Kbytes of main memory

Autoboot executing command: "boot 
disk0:s222-adventerprisek9_wan-mz.122-18.SXF6.bin"
Command error complete on disk0:
open: read error...requested 0x4 bytes, got 0xffffffff
trouble reading device magic number
loadprog: error - on file open
boot: cannot load "disk0:s222-adventerprisek9_wan-mz.122-18.SXF6.bin"
Exit at the end of BOOT string
rommon 1 >



When I do "reset" from rommon the SUP2 boots OK from the flash disk with 
12.2.18. But not with reload inside IOS again. Any idea what can cause 
this?

/Jonas