flash is read only,unable to upgrade IOS for 2621XM router

Unanswered Question
Oct 22nd, 2008
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I am not able to upgrade the IOS for 2621 router.Please advise.

------------------ show version ------------------

Cisco Internetwork Operating System Software

IOS (tm) C2600 Software (C2600-IK8O3S-M), Version 12.2(11)T, RELEASE SOFTWARE (fc1)

TAC Support: http://www.cisco.com/tac

Copyright (c) 1986-2002 by cisco Systems, Inc.

Compiled Thu 01-Aug-02 12:47 by ccai

Image text-base: 0x8000809C, data-base: 0x818188F4

ROM: System Bootstrap, Version 12.2(7r) [cmong 7r], RELEASE SOFTWARE (fc1)

Z0-2621-MALVIYANGR uptime is 3 days, 10 hours, 50 minutes

System returned to ROM by reload at 04:05:57 IST Sun Oct 19 2008

System restarted at 00:08:49 IST Mon Oct 20 2008

System image file is "flash:c2600-ik8o3s-mz.122-11.T.bin"

cisco 2621XM (MPC860P) processor (revision 0x100) with 60416K/5120K bytes of memory.

Processor board ID JMX0643L2B5 (879884371)

M860 processor: part number 0, mask 49

Bridging software.

X.25 software, Version 3.0.0.

2 FastEthernet/IEEE 802.3 interface(s)

32K bytes of non-volatile configuration memory.

49152K bytes of processor board System flash (Device not programmable)

Configuration register is 0x2102

------------------ show file systems ------------------

File Systems:

Size(b) Free(b) Type Flags Prefixes

29688 20242 nvram rw nvram:

- - opaque rw null:

- - opaque rw system:

- - opaque ro xmodem:

- - opaque ro ymodem:

- - network rw tftp:

* 50331648 34523140 flash ro flash:

- - network rw rcp:

- - network rw pram:

- - network rw ftp:

- - network rw scp:

Please help.

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adhityakarthik Wed, 10/22/2008 - 22:31
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Could you please let me know the below points

1)Total size of the flash

2) current size of the IOS

3)Proposed(NEW) size of the IOS

what is the DRAM size

and please let me know what error message your getting and also please post the error



vinayjaiswal Thu, 10/23/2008 - 01:17
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total size of flash is 48MB

Current size is 16 MB

Proposed(NEW) size of the IOS is 12 MB

DRAM Size is 64MB

Error is it says Device is Read only



omar.elmohri Thu, 10/23/2008 - 01:50
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Can you please attach the show tech-support log please.



Pravin Phadte Thu, 10/23/2008 - 03:18
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Plz provide the output of.

show flash

show ver and the name of the ios u want to upgrade.

Also let us know how are u dooing the upgraded the doc u are refering.



Richard Burts Thu, 10/23/2008 - 07:26
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I have done some looking and I do not find any indication of what would cause the flash in 2621XM to be read only. But that does seem to be the case with your router. I believe that I had a similar problem a while back (different platform but its flash was marked read only). If my memory is correct I resolved the issue by doing a format of the flash, which erased all content on the flash, but produced a flash that I could write to. So I suggest that you try to format this flash and see if the result allows you to put a different IOS onto the flash.




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