cramfs:wrong magic

cramfs:wrong magic

[Vidya Srinivas]

Hi all,

   I am using Montavista Linux. I want to mount cramfs as my rootfile
system. In the kernal command line arguments i have mentioned:

root=/dev/mtdblock3 rootfstype=cramfs init=/sbin/init

At the time of FS mounting, the kernel is throwing this error:

cramfs : wrong magic

And, the kernel panics.

I checked the magic numberof my file system image file (by reading the
contents in textpad), it shows 0x28cd3d45 which i think is the right magic
number.

If i simply try to mount this image on my Red hat 7.3,

mount -o loop -t cramfs img.cramfs /mnt/

It mounts correctly without giving any problem.

What might be the mistake?

Please help me out.

Regards,

-- 
Vidya.S
BPL TELECOM LTD
11th KM, Arikere
Bannergatta Road,
Bangalore - 560072
email - vidya.s@bpltelecom.com
Ph - 6589080 extn - 2005

Re: cramfs:wrong magic

[Ilguiz Latypov]

On Tue, Aug 26, 2003 at 12:32:16PM +0530, Vidya Srinivas wrote:

> root=/dev/mtdblock3 rootfstype=cramfs init=/sbin/init
>
> At the time of FS mounting, the kernel is throwing this error:
>
> cramfs : wrong magic

I know Debian (http://debian.org/) has a kernel patch to correctly
support cramfs root file system.  Debian maintainers provide this patch
for a long time.

I understand /dev/mtdblock3 can also be verified against the original
image.

--
Ilguiz Latypov
 
tel.  +1 (519) 569-7193
31 Oprington Drive, Unit D3
Kitchener, Ontario N2N 3G3

Re: cramfs:wrong magic

[Vidya Srinivas]

Hi,

Thanks a lot for the support.

Actually it was a problem  regarding the endianness.
My system was a big endian system and i am supposed to create a cramfs
image for a big endian system (-rb option). One more person Mr. Fillod
Stephane helped me out.

Thanks again.

Regards,
Vidya


>
> On Tue, Aug 26, 2003 at 12:32:16PM +0530, Vidya Srinivas wrote:
>
>> root=/dev/mtdblock3 rootfstype=cramfs init=/sbin/init
>>
>> At the time of FS mounting, the kernel is throwing this error:
>>
>> cramfs : wrong magic
>
> I know Debian (http://debian.org/) has a kernel patch to correctly
> support cramfs root file system.  Debian maintainers provide this patch
> for a long time.
>
> I understand /dev/mtdblock3 can also be verified against the original
> image.
>
> --
> Ilguiz Latypov
>
> tel.  +1 (519) 569-7193
> 31 Oprington Drive, Unit D3
> Kitchener, Ontario N2N 3G3
>
>
> ______________________________________________________
> Linux MTD discussion mailing list
> http://lists.infradead.org/mailman/listinfo/linux-mtd/


-- 
Vidya.S
BPL TELECOM LTD
11th KM, Arikere
Bannergatta Road,
Bangalore - 560072
email - vidya.s@bpltelecom.com
Ph - 6589080 extn - 2005

cramfs: wrong magic

[Bruce Tang]

Hi,Xavier 

I had used the kernel source from samsung
to boot S3c2410 based board. While booting, the kernel couldn't mount the
filesystem (cramfs).
It panics with the message "cramfs wrong magic". 

This problem is very similar with your problem I found at 
http://lists.infradead.org/pipermail/linux-mtd/2004-March/009431.html
can you help me to solve this issue. I had listed below the boot
message. 

Thanks and Regards,
Bruce Tang 

.......................
pty: 256 Unix98 ptys configured
s3c2410-ts initialized
S3C2410 Real Time Clock Driver v0.1
block: 128 slots per queue, batch=32
eth0: cs8920 rev `(3.3 Volts) found at 0xd0000300
cs8900a.c: wrong device driver!
cs89x0: no cs8900 or cs8920 detected.Be sure to disable PnP with SETUP
NAND device: Manufacture ID: 0xec, Chip ID: 0x76 (Samsung K9D1208V0M)
bon0: 00000000-00030000 (00030000) 00000000
bon1: 00030000-00100000 (000d0000) 00000000
bon2: 00100000-03ffc000 (03efc000) 00000000
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP, IGMP
IP: routing cache hash table of 512 buckets, 4Kbytes
TCP: Hash tables configured (established 4096 bind 4096)
NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
NetWinder Floating Point Emulator V0.95 (c) 1998-1999 Rebel.com
cramfs: wrong magic
FAT: bogus logical sector size 65535
Kernel panic: VFS: Unable to mount root fs on 61:02 

Re: cramfs: wrong magic

[Thomas Gleixner]

On Tue, 2005-03-22 at 16:50 +0800, Bruce Tang wrote:
> I had used the kernel source from samsung

You use a vendor kernel. Please read

http://www.linux-mtd.infradead.org/source.html#kernelversions 


tglx