2010-03-16 07:16:34 Kernel panics : Cramfs as root file system

Santhosh Kumar (INDIA)

Message: 87251

Am trying to use cramfs in flash memory as my root file system. When booted my bf527 device with vmImage, kernel panics with error message "Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)"

Used referance docs.blackfin.uclinux.org/doku.php?id=linux-kernel:cramfs.

Dont know what am missing here, my rootfs contents are bin etc home lib mnt proc root sbin sys tmp usr var. Do i have to create /dev/console ?

Steps done:

1) Written my cramfs image(rootfs.cramfs) in one of my MTD flash partition(/dev/mtd2), using bootloader commands(protect off, erase, tftpboot and cp.b)

2) Set my bootargs as root=/dev/mtdblock2 ro rootfstye=cramfs

Posting error log below:

VFS: Cannot open root device "<NULL>" or unknown-block(0,0)

Please append a correct "root=" boot option; here are the available partitions:

1f00 256 mtdblock0 (driver?)

1f01 384 mtdblock1 (driver?)

1f02 7552 mtdblock2 (driver?)

1f03 7680 mtdblock3 (driver?)

1f04 512 mtdblock4 (driver?)

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

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2010-03-16 10:29:12 Re: Kernel panics : Cramfs as root file system