VFS: Cannot open root device

clloud66kimo

Raw file loaded 0x03000000-0x030b93b7, assumed entry at 0x03000000
RedBoot> exec 0x03000000
Using base address 0x03000000 and length 0x000b93b8
Uncompressing Linux...................................................... done,.
Linux version 2.4.20_mvl31-ixdp4xx (root@red9) (gcc version 3.3.1 (MontaVista 35
CPU: XScale-IXP4xx/IXC11xx [690541c1] revision 1 (ARMv5TE)
CPU: D undefined 5 cache
CPU: I cache: 32768 bytes, associativity 32, 32 byte lines, 32 sets
CPU: D cache: 32768 bytes, associativity 32, 32 byte lines, 32 sets
Machine: Intel IXDP425 Development Platform
On node 0 totalpages: 32768
zone(0): 16384 pages.
zone(1): 16384 pages.
zone(2): 0 pages.
Kernel command line: console=ttyS0,115200 root=/dev/mtdblock2
rw ramdisk_size=50
Calibrating delay loop... 527.56 BogoMIPS
Memory: 128MB = 128MB total
Memory: 127824KB available (1279K code, 448K data, 68K init)
XScale Cache/TLB Locking Copyright(c) 2001 MontaVista Software, Inc.
XScale cache_lock_init called
   Calling consistent alloc
   low_level_page initialized
   low_level_page @ 0xc8800000
      icache_lock_fn @ 0xc8800080
      dcache_lock_fn @ 0xc88000a0
      icache_unlock_fn @ 0xc8800098
      dcache_unlock_fn @ 0xc88000f0
Initializing TLB locking
TLB locking initialized
Dentry cache hash table entries: 16384 (order: 5, 131072 bytes)
Inode cache hash table entries: 8192 (order: 4, 65536 bytes)
Mount-cache hash table entries: 2048 (order: 2, 16384 bytes)
Buffer-cache hash table entries: 8192 (order: 3, 32768 bytes)
Page-cache hash table entries: 32768 (order: 5, 131072 bytes)
POSIX conformance testing by UNIFIX
PCI Autoconfig: Found Bus 0, Device 2, Function 0
PCI Autoconfig: BAR 0, Mem, size=0x1000000, address=0x4b000000
PCI Autoconfig: Found Bus 0, Device 3, Function 0
PCI Autoconfig: BAR 0, Mem, size=0x1000, address=0x4afff000
PCI Autoconfig: Found Bus 0, Device 3, Function 1
PCI Autoconfig: BAR 0, Mem, size=0x1000, address=0x4affe000
PCI Autoconfig: Found Bus 0, Device 3, Function 2
PCI Autoconfig: BAR 0, Mem, size=0x100, address=0x4affdf00
PCI: bus0: Fast back to back transfers disabled
Linux NET4.0 for Linux 2.4
Based upon Swansea University Computer Society NET3.039
Initializing RT netlink socket
LSP Revision 1
Starting kswapd
Disabling the Out Of Memory Killer
devfs: v1.12c (2002081 Richard Gooch ([email protected])
devfs: boot_options: 0x1
JFFS2 version 2.1. (C) 2001, 2002 Red Hat, Inc., designed by Axis Communication.
i2c-core.o: i2c core module version 2.6.2 (2001111
i2c-dev.o: i2c /dev entries driver module version 2.6.2 (2001111
i2c-algo-bit.o: i2c bit algorithm module version 2.6.2 (2001111
i2c-proc.o version 2.6.2 (2001111
pty: 256 Unix98 ptys configured
Serial driver version 5.05c (2001-07-0 with MANY_PORTS SHARE_IRQ SERIAL_PCI ed
ttyS00 at 0xff000003 (irq = 15) is a XSCALE UART
ttyS01 at 0xff001003 (irq = 13) is a XSCALE UART
RAMDISK driver initialized: 16 RAM disks of 58000K size 1024 blocksize
loop: loaded (max 8 devices)
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP
IP: routing cache hash table of 1024 buckets, 8Kbytes
TCP: Hash tables configured (established 8192 bind 16384)
NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
NetWinder Floating Point Emulator V0.95 (c) 1998-1999 Rebel.com
VFS: Cannot open root device "mtdblock2" or 1f:02
Please append a correct "root=" boot option
Kernel panic: VFS: Unable to mount root fs on 1f:0

为什么?? 无法开启mtdblock2

jackzheng2002

I can't see your partition infomation from the log.
Pls check you use the right partition in the cmd line first, and load the kernel to the right partition.

weiglink

利用了devfs
root=/dev/mtdblock/2

jackzheng2002

Maybe you can enable the MTD debug switch for debugging
I think many reasons can cause this:
VFS: Cannot open root device "mtdblock2" or 1f:02
Just as I mentioned,
Pls check you use the right partition in the cmd line first, and load the kernel to the right partition.