[nsp] PIX upgrade failed

[Mikhail Assiaev]

Hello,

has anyone encountered "checksum verification on install image failed"
during the upgrade process of PIX515 ?
I am trying to upgrade from 6.1(4) to 6.3(3) (actually, I've already
upgraded all my PIX515's except one). After I load the image to memory via
"tftp" command in monitor mode,  I get the following error :

monitor> tftp
tftp pix633.bin at X.X.X.X ...............<skip>
Received 2064384 bytes
Cisco Secure PIX Firewall admin loader (3.0) #0: Wed Aug 13 13:38:20 PDT
2003
Flash=i28F640J5 @ 0x300
BIOS Flash=AT29C257 @ 0xd8000
imgsum_config: sumval(0x6caa) md5(0x00a3de6a 0x031605ed 0x0841ffda
0xb04fd68a)
imgsum_verify: chksum(0x0   ) md5(0xf277191f 0xd96dd5cf 0xdd65ba25
0x4518d4d8)
Checksum verification on install image failed.
Rebooting....
PIX BIOS (4.0) #0: Tue May 18 16:29:54 PDT 1999
Platform PIX-515
Flash=i28F640J5 @ 0x300
<......>
ends up in a boot loop.
The only image that I could load into mem without checksum verification
error is 5.0(3), but when it tries to boot, a boot loop occurs again.

I suspect a hardware problem, probably with DRAM, but I wonder if anyone had
seen such thing before and could give me a clue.

Thanks.

Best regards,
Misha