Antwort: Re: ATA flash disk ok, missing ip config

Mohamed Hamed mhamed at
Tue Oct 16 22:44:53 EST 2007

Dear Sir,

	i'm trying to install qemu in a debian linux system , ubuntu , and when
i finished from installation and trying to run the qemu more error be
found as follow :

 (qemu) Uncompressing
Linux.......................................................................... done, booting the kernel.
Linux version 2.6.17-rc3 (paul at wren) (gcc version 4.1.0 (CodeSourcery
ARM)) #53 Thu May 4 15:05:18 BST 2006
CPU: ARM926EJ-Sid(wb) [41069265] revision 5 (ARMv5TEJ)
Machine: ARM-IntegratorCP
Memory policy: ECC disabled, Data cache writeback
CPU0: D VIVT write-through cache
CPU0: I cache: 4096 bytes, associativity 4, 32 byte lines, 32 sets
CPU0: D cache: 65536 bytes, associativity 4, 32 byte lines, 512 sets
Built 1 zonelists
Kernel command line: console=ttyAMA0 root= /dev/nfs
nfsroot=,rsize=8192,wsize=8192,hard,intr,tcp,nolock ip= 
PID hash table entries: 2048 (order: 11, 8192 bytes)
Console: colour dummy device 80x30
Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)
Memory: 256MB = 256MB total
Memory: 257280KB available (1928K code, 388K data, 104K init)
Mount-cache hash table entries: 512
CPU: Testing write buffer coherency: ok
NET: Registered protocol family 16
NetWinder Floating Point Emulator V0.97 (double precision)
Installing knfsd (copyright (C) 1996 okir at
Initializing Cryptographic API
io scheduler noop registered
io scheduler anticipatory registered (default)
io scheduler deadline registered
io scheduler cfq registered
CLCD: Integrator/CP hardware, VGA display
Clock CLCDCLK: setting VCO reg params: S=1 R=39 V=35
Console: switching to colour frame buffer device 80x30
Serial: AMBA PL011 UART driver
mb:16: ttyAMA0 at MMIO 0x16000000 (irq = 1) is a AMBA/PL011
mb:17: ttyAMA1 at MMIO 0x17000000 (irq = 2) is a AMBA/PL011
RAMDISK driver initialized: 16 RAM disks of 8192K size 1024 blocksize
loop: loaded (max 8 devices)
nbd: registered device at major 43
smc91x.c: v1.1, sep 22 2004 by Nicolas Pitre <nico at>
eth0: SMC91C11xFD (rev 1) at d0816000 IRQ 27 [nowait]
eth0: Ethernet addr: 52:54:00:12:34:56
mice: PS/2 mouse device common for all mice
Green LED off
input: AT Raw Set 2 keyboard as /class/input/input0
input: ImExPS/2 Generic Explorer Mouse as /class/input/input1
NET: Registered protocol family 2
IP route cache hash table entries: 2048 (order: 1, 8192 bytes)
TCP established hash table entries: 8192 (order: 3, 32768 bytes)
TCP bind hash table entries: 4096 (order: 2, 16384 bytes)
TCP: Hash tables configured (established 8192 bind 4096)
TCP reno registered
IPv4 over IPv4 tunneling driver
GRE over IPv4 tunneling driver
TCP bic registered
NET: Registered protocol family 1
NET: Registered protocol family 17
802.1Q VLAN Support v1.8 Ben Greear <greearb at>
All bugs added by David S. Miller <davem at>
VFP support v0.3: implementor 41 architecture 1 part 10 variant 9 rev 0
eth0: link up
IP-Config: Complete:
      device=eth0, addr=, mask=, gw=,
     host=arm, domain=, nis-domain=home,
     bootserver=, rootserver=, rootpath=
Looking up port of RPC 100003/2 on
Root-NFS: Unable to get nfsd port number from server, using default
Looking up port of RPC 100005/1 on
Root-NFS: Unable to get mountd port number from server, using default
Root-NFS: Server returned error -5 while mounting /nfs/share/arm
VFS: Unable to mount root fs via NFS, trying floppy.
VFS: Cannot open root device "<NULL>" or unknown-block(2,0)
Please append a correct "root=" boot option
Kernel panic - not syncing: VFS: Unable to mount root fs on

and i don't know what is the reason and i don't know what the line root
=boot option 

this is the script which i run


console="ttyAMA0"		# serial console
nfsserver=""		# address of NFS server
nfsdir="/nfs/share/arm"		# exported share where debian/arm is installed
address=""		# address for guest server
gateway=""		# default gateway
netmask=""		# subnet mask
hostname="arm.home"		# hostname for guest server
device="eth0"			# interface that guest server will use
mem=256				# memory for guest server in Mb
tap="/var/run/vde/tap0.ctl"	# vde tap socket

kernel="/usr/local/etc/images/zimage.arm"	# arm kernel
nfsopts="rsize=8192,wsize=8192,hard,intr,tcp,nolock"	# nfs options



if [ "x$1" == "xsingle" ]
vdeq qemu-system-arm -sock $tap -m $mem \
	-kernel $kernel -nographic \
	-append "$consoleopt root= /dev/nfs  $nfsrootopt $ipopt $init" 

and i don't know this line root = /dev/nfs , where this directory  is

thanks for helping me 

i hope to reply me at this mail mhamed at
or at eng_m_elsaidy at


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