unable to load cramfs

Hi slsnios,

> Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,0)

There are many possible causes.

First, make sure you don't have the broken cramfs code. See:

http://forum.niosforum.com/forum/index.php...=2383&hl=cramfs (http://forum.niosforum.com/forum/index.php?showtopic=2383&hl=cramfs)

Once you're sure your cramfs code is clean, you might want to enable jffs2/cramfs support in

u-boot. This will allow you to list and load jffs2/cramfs files into ram and view some file system

information -- it's a good way to ensure you have a clean filesystem image _before_ you boot

the kernel.

And, of course, double-check your kernel configuration to ensure you have cramfs support

enabled ;-)

Regards,

--Scott

--- Quote Start ---

originally posted by smcnutt@Jun 30 2006, 06:07 PM

hi slsnios,

> kernel panic - not syncing: vfs: unable to mount root fs on unknown-block(31,0)

there are many possible causes.

first, make sure you don't have the broken cramfs code. see:

http://forum.niosforum.com/forum/index.php...=2383&hl=cramfs (http://forum.niosforum.com/forum/index.php?showtopic=2383&hl=cramfs)

once you're sure your cramfs code is clean, you might want to enable jffs2/cramfs support in

u-boot. this will allow you to list and load jffs2/cramfs files into ram and view some file system

information -- it's a good way to ensure you have a clean filesystem image _before_ you boot

the kernel.

and, of course, double-check your kernel configuration to ensure you have cramfs support

enabled ;-)

regards,

--scott

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=16571)

--- quote end ---

--- Quote End ---

hi scott

thans

but

i have already changed cramfs code.

i selected cramfs option.

i checked image of cramfs which is genereted by mkcram command.

now i got sam problem..

please help me,what should be my next step?

Hi slsnios,

Try adding the following to the kernel command line:

rootfstype=cramfs

Regards,

--Scott

--- Quote Start ---

originally posted by smcnutt@Jul 7 2006, 02:04 AM

hi slsnios,

try adding the following to the kernel command line:

rootfstype=cramfs[/b]

Regards,

--Scott

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=16692)

--- Quote End ---

[/b]

--- Quote End ---

Thanks scott

but can you tell me where i have to insert tis line at source code or project folder ,..where is kernel command line..

--- Quote Start ---

originally posted by slsnios+jul 7 2006, 04:45 pm--><div class='quotetop'>quote (slsnios @ jul 7 2006, 04:45 pm)</div>

--- quote start ---

<!--quotebegin-smcnutt@Jul 7 2006, 02:04 AM

hi slsnios,

try adding the following to the kernel command line:

rootfstype=cramfs[/b]

Regards,

--Scott

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=16692)

--- Quote End ---

[/b]

--- Quote End ---

Thanks scott

but can you tell me where i have to insert tis line at source code or project folder ,..where is kernel command line..

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=16704)</div>

[/b]

--- Quote End ---

In kernel menuconfig,

Processor type and features --> () Default kernel command string

root=/dev/mtdblock0 ro rootfstype=cramfs

Hi slsnios,

> ./mkcramfs -n cramfs -z -r ./dir cramfs.img

> then it is giving following error,

... snip ...

> cramfs.img: invalid cramfs--wrong magic

You&#39;re reversing the endian order (-r option) & cramfschk does not have similar option. Endian

order reversal should not be necessary.

Regards,

--Scott

hi scott

so,am i wrong or right?

where am i doing mistake ?

with regard

slsnios

Hi slsnios,

> so,am i wrong or right?

If you&#39;re creating the cramfs image on a little endian machine (like a PC) don&#39;t use the -r option.

Regards,

--Scott

hi scott

so much thanks.......infinite

atleast ,now kernel is able to find which is fs is there.

but still now i have problem

now, i got massegs on terminal like

uClinux/Nios II

Altera Nios II support © 2004 Microtronix Datacom Ltd.

Built 1 zonelists

Kernel command line: root=/dev/mtdblock0 ro

PID hash table entries: 64 (order: 6, 1024 bytes)

Dentry cache hash table entries: 2048 (order: 1, 8192 bytes)

Inode-cache hash table entries: 1024 (order: 0, 4096 bytes)

Memory available: 7040k/8192k RAM, 0k/0k ROM (800k kernel code, 235k data)

Mount-cache hash table entries: 512 (order: 0, 4096 bytes)

Linux NoNET1.0 for Linux 2.6

Serial: JTAG UART driver $Revision: 1.4 $

ttyJ0 at MMIO 0x80221080 (irq = 1) is a jtag_uart

io scheduler noop registered

io scheduler anticipatory registered

io scheduler deadline registered

io scheduler cfq registered

RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize

UP3 map: Found 1 x16 devices at 0x0 in 16-bit bank

Amd/Fujitsu Extended Query Table at 0x0040

number of CFI chips: 1

cfi_cmdset_0002: Disabling erase-suspend-program due to code brokenness.

cmdlinepart partition parsing not available

RedBoot partition parsing not available

Using altera development partition definition

Creating 2 MTD partitions on "altera map":

0x00100000-0x00200000 : "romfs"

0x00000000-0x00100000 : "loader/kernel"

VFS: Mounted root (cramfs filesystem) readonly.

Freeing unused kernel memory: 48k freed (0x8e4000 - 0x8ef000)

Warning: unable to open an initial console.

Kernel panic - not syncing: No init found. Try passing init= option to kernel.

if i think init is not there ,then it should be not worked when same fs is used as romfs.bin

because i got kernel o/p ,when i used same fs without compress as romfs.

please help me.