problem with RAM

[hari_bhr]

Hi

i have upgraded the RAM form 32MB to 128MB

i have removed the 32 MB and kept 128MB new RAM

when i switch it on back, iam getting this problem

any one can help me, it will be apprciated

System Bootstrap, Version 12.0(6r)T, RELEASE SOFTWARE (fc1)

Copyright (c) 1999 by cisco Systems, Inc.

Bad RAM at location 0xA0000000: wrote 0xA0000000, read 0xA0000008

System Bootstrap, Version 12.0(6r)T, RELEASE SOFTWARE (fc1)

Copyright (c) 1999 by cisco Systems, Inc.

Bad RAM at location 0xA0000000: wrote 0xA0000000, read 0xA0000008

hari

[t.baranski]

What device did you upgrade? It may not support that much memory, or it may not support the particular module you used.

[hari_bhr]

Hi

i have not updated any thing,

it was year old box

after some time iam getting this error

*** Watch Dog Timeout ***

PC = 0x800001c0, SP = 0x60e3e178

*** TLB (Load/Fetch) Exception ***

Access address = 0x30800000

PC = 0xd4d4d4d4, Cause = 0x8008, Status Reg = 0x30410002

Failure detected during ROMMON start-up tests. Restart ROMMON.

System Bootstrap, Version 12.0(6r)T, RELEASE SOFTWARE (fc1)

Copyright (c) 1999 by cisco Systems, Inc.

Testing lower main memory - data equals address

Bad RAM at location 0xA0000004: wrote 0xA0000004, read 0x44BA0000

Testing lower main memory - data equals address

Bad RAM at location 0xA0000004: wrote 0xA0000004, read 0x44BA0000

System Bootstrap, Version 12.0(6r)T, RELEASE SOFTWARE (fc1)

Copyright (c) 1999 by cisco Systems, Inc.

Testing lower main memory - data equals address

Testing lower main memory - checkerboard

Testing lower main memory - inverse checkerboard

Clearing lower 32K memory for cache initialization

Clearing bss

Reading monitor variables from NVRAM

Enabling interrupts

Initializing TLB

Initializing cache

Reading cookie

Initializing main memory

Sizing NVRAM

Initializing required TLB entries

Configuring FLASH params

Initializing PCI subsystem

Exiting init

C3660 processor with 32768 Kbytes of main memory

Main memory is configured to 64 bit mode with parity disabled

*** TLB (Load/Fetch) Exception ***

Access address = 0xd4d4d4d4

PC = 0xbfc2d4ac, Cause = 0x8, Status Reg = 0x3041f003

*** Address Error (Load/Fetch) Exception ***

Access address = 0xffffffff

PC = 0xffffffff, Cause = 0x10, Status Reg = 0x3041f003

*** Address Error (Load/Fetch) Exception ***

Access address = 0xffffffff

PC = 0xffffffff, Cause = 0x10, Status Reg = 0x3041f003

monitor: command "boot" aborted due to exception

Testing lower main memory - data equals address

Testing lower main memory - checkerboard

Testing lower main memory - inverse checkerboard

Clearing lower 32K memory for cache initialization

Clearing bss

Reading monitor variables from NVRAM

Enabling interrupts

Initializing TLB

Initializing cache

Reading cookie

Initializing main memory

Sizing NVRAM

Initializing required TLB entries

Configuring FLASH params

Initializing PCI subsystem failed, opcode = 0x28

*** TLB (Store) Exception ***

Access address = 0xdcdcdcdc

PC = 0xbfc22fdc, Cause = 0xc, Status Reg = 0x3041f003

then , when make off and on

then iam getting

System Bootstrap, Version 12.0(6r)T, RELEASE SOFTWARE (fc1)

Copyright (c) 1999 by cisco Systems, Inc.

Bad RAM at location 0xA0000000: wrote 0xA0000000, read 0x5C5C5C5C

after 2 days if i make on, it works for 7 hours, and again the same problem

looking strange

not i dont have any modules installed in this

any suggestion will be good

hari

[Georg Pauwen]

Hello,

have you put the original memory back into the same bank as where it was before ? When you use different SIMMs try to put the lower one (e.g. the 32MB DRAM) into the first available bank and the higher one into the second next available bank.

Regards,

GP

[stierb]

If you are using a 3660 (thought i saw that in the pasted output) you'll have to consider its memory installation requirements (http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/cis3600/hw_inst/hw_notes/3636mem.htm).

Bascially, for the 3660 you need a module in slot 0, and it has to be of larger capacity than the one in slot 1 if present.

You might be looking at a bad stick of ram, or maybe both sticks of ram are faulty. Either case, it seems like you are describing a hardware failure of some kind.