Cisco 6506 Stuck in rommon due to bootdisk fails

[mohammadSaeed01]

Hi guys

I was having one issue in core 6506 model. I removed the cf card and I format it then i upload a new fw after that i inset it but the rommon mode could not read bootdisk and bootflash as well...How can I solve it?

Thanks

[marce1000]

 - Check this document : https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/hardware/Config_Notes/6507_01.html , pay attention to supported Flash card(s) mentioned and installation procedure (format).

 M.

[mohammadSaeed01]

The doc talked about the slot0 cf but i removed the inside cf which comes with sup. 

[Leo Laohoo]

What is the Supervisor card model?

[mohammadSaeed01]

Cat6k-sup720/sp this is the model of sup

[Leo Laohoo]

What error message when an external CF is used?

[mohammadSaeed01]

Actually i removed the internal cf 1g and i format it in my laptop then i copied a new ios bin file then i rensert it i side not from outside and gives me error bootdisk doesnt contain a valid magic number and before i was able to make dir bootflash: but now even bootflash is not there any more

[Leo Laohoo]

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@mohammadSaeed01 wrote:
bootdisk doesnt contain a valid magic

---

Corrupt partition or the file is corrupt.

Console into the supervisor card and attempt to boot the IOS using the external CF.  Post the entire boot-up process.  

[mohammadSaeed01]

Can I use the interal cf to insert it external because I dont have anpther cf to use it in external? 

[Leo Laohoo]

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@mohammadSaeed01 wrote:

Can I use the interal cf to insert it external because I dont have anpther cf to use it in external? 

---

And how will you be able to determine if the internal CF did not fail?

[mohammadSaeed01]

You are right! So what is the best and guarantee CF I can use it in external CF? I have Transcend 4G CF, can I use it?

[Leo Laohoo]

Yes, as long as the CF is formatted to FAT16.

[mohammadSaeed01]

Oh, OK, and also the internal CF should be FAT16? because I format the internal CF with FAT32 maybe that's why the bootflash: not detect it!

[mohammadSaeed01]

I will check the FAT version in Internal CF tomorrow! I am afraid it's 32!

[mohammadSaeed01]

I format it to FAT16 and here is the logs I have on console:

rommon 7 > reset

System Bootstrap, Version 8.5(4)
Copyright (c) 1994-2009 by cisco Systems, Inc.
Cat6k-Sup720/SP processor with 1048576 Kbytes of main memory

Autoboot: failed, BOOT string is empty
Autoboot executing command: "boot "
device does not contain a valid magic number
boot: cannot open "bootdisk:"
boot: cannot determine first file name on device "bootdisk:"

System Bootstrap, Version 8.5(4)
Copyright (c) 1994-2009 by cisco Systems, Inc.
Cat6k-Sup720/SP processor with 1048576 Kbytes of main memory

Autoboot executing command: "boot bootdisk:"
device does not contain a valid magic number
boot: cannot open "bootdisk:"
boot: cannot determine first file name on device "bootdisk:"

System Bootstrap, Version 8.5(4)
Copyright (c) 1994-2009 by cisco Systems, Inc.
Cat6k-Sup720/SP processor with 1048576 Kbytes of main memory

rommon 1 > dir
usage: dir <device>
rommon 2 > dir disk0:
device does not contain a valid magic number
dir: cannot open device "disk0:"
rommon 3 > dir slot0:
bad device name (device not supported)
usage: dir <device>
rommon 4 > dir
usage: dir <device>
rommon 5 >
rommon 5 >
rommon 5 >
rommon 5 >
rommon 5 > set
PS1=rommon ! >
LOG_PREFIX_VERSION=1
SLOTCACHE=cards;
RANDOM_NUM=1542863794
BOOT=
NT_K=0:0:0:0
BSI=0
PF_REDUN_CRASH_COUNT=0
CRASHINFO=bootflash:crashinfo_20221115-073627
RET_2_RTS=07:36:29 UTC Tue Nov 15 2022
RET_2_RCALTS=1668497792
?=1
rommon 6 > sync
rommon 7 > dir bootflash:
device does not contain a valid magic number
dir: cannot open device "bootflash:"
rommon 8 > dir disk0:
device does not contain a valid magic number
dir: cannot open device "disk0:"
rommon 9 > dir slot0:
bad device name (device not supported)
usage: dir <device>
rommon 10 > dir disk1:
PCMCIA disk1: device is not initialized
open: read error...requested 0x4 bytes, got 0x0
trouble reading device magic number
dir: cannot open device "disk1:"
rommon 11 > dir disk0:
device does not contain a valid magic number
dir: cannot open device "disk0:"
rommon 12 > dir disk0:
PCMCIA disk0: device is not initialized
open: read error...requested 0x4 bytes, got 0x0
trouble reading device magic number
dir: cannot open device "disk0:"
rommon 13 >

rommon 13 >
rommon 13 >
rommon 13 >
rommon 13 >
rommon 13 > dir disk0:
device does not contain a valid magic number
dir: cannot open device "disk0:"
rommon 14 >