this is an embedded board,

if i nfs boot from /home/user1/fs, it boots fine.

Then i "sudo cp -R /home/user1/fs /home/5883",
then try to nfs boot from /home/5883/fs, it says


VFS: Unable to mount root fs via NFS, trying floppy.
VFS: Cannot open root device "nfs" or unknown-block(2,0)
Please append a correct "root=" boot option; here are the available partitions:
1f00 128 mtdblock0 (driver?)
1f01 1664 mtdblock1 (driver?)
1f02 256 mtdblock2 (driver?)
1f03 3072 mtdblock3 (driver?)
1f04 3072 mtdblock4 (driver?)
1f05 65536 mtdblock5 (driver?)
1f06 65536 mtdblock6 (driver?)
1f07 4096 mtdblock7 (driver?)
1f08 380928 mtdblock8 (driver?)
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)
[<c0039d78>] (unwind_backtrace+0x0/0xec) from [<c033f668>] (panic+0x54/0x178)
[<c033f668>] (panic+0x54/0x178) from [<c0008ec0>] (mount_block_root+0x1d0/0x210)
[<c0008ec0>] (mount_block_root+0x1d0/0x210) from [<c0008fa0>] (mount_root+0xa0/0xc0)
[<c0008fa0>] (mount_root+0xa0/0xc0) from [<c0009128>] (prepare_namespace+0x168/0x1c0)
[<c0009128>] (prepare_namespace+0x168/0x1c0) from [<c0008440>] (kernel_init+0x108/0x148)
[<c0008440>] (kernel_init+0x108/0x148) from [<c00355f8>] (kernel_thread_exit+0x0/0x8)


this is the only change, any suggestions ?

home/5883/fs
and
home/5883

are not the same. Not same permissions maybe, not same nfs mount, also dunno about how this boots, any comments to some folder?


Has nothing to do with floppy, just correct access to the data.

i've changed the group/owner recursively, they should be the same.

panic ....

Have you updated the /etc/exports file to reflect the change in the filesystem to be mounted?

cannot use cp, have to use tar, learned sth. today ...