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Old 11-17-2005, 12:23 PM   #1
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VFS: Cannot open root device "cobd1" or unknown-block(117,1)

Hi guys, need help i'm new to linux on awhole and i'm trying to install colinux on a windows 2003 server platform. i've followed the instructions directly went over them again and again. I dont see what i'm doing wrong. please help. Thanks

following is the command "colinux-daemon.exe -c debian3.xml" results.

Also the CoLinux is installed on C:\Program Files\coLinux>

C:\Program Files\coLinux>colinux-daemon.exe -c debian3.xml
Cooperative Linux Daemon, 0.6.2
Compiled on Sat Feb 5 10:19:28 2005

auto selecting TAP
found TAP device named "Local Area Connection"
opening TAP: "Local Area Connection"
driver version 8.1
enabling TAP...
Linux version 2.6.10-co-0.6.2 ( (gcc version 3.3.5 (Debia
n 1:3.3.5-8)) #5 Sat Feb 5 10:19:16 IST 2005
256MB LOWMEM available.
initrd enabled: start: 0xcfea2000 size: 0x0015db27)
On node 0 totalpages: 65536
DMA zone: 0 pages, LIFO batch:1
Normal zone: 65536 pages, LIFO batch:16
HighMem zone: 0 pages, LIFO batch:1
Built 1 zonelists
Kernel command line: root=/dev/cobd0
Initializing CPU#0
Setting proxy interrupt vectors
PID hash table entries: 2048 (order: 11, 32768 bytes)
Using cooperative for high-res timesource
Console: colour CoCON 80x25
Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
Memory: 254592k/262144k available (1502k kernel code, 0k reserved, 548k data, 10
4k init, 0k highmem)
Calibrating delay loop... 52.32 BogoMIPS (lpj=261632)
Mount-cache hash table entries: 512 (order: 0, 4096 bytes)
CPU: After generic identify, caps: bfebfbff 00000000 00000000 00000000
CPU: After vendor identify, caps: bfebfbff 00000000 00000000 00000000
CPU: Trace cache: 12K uops, L1 D cache: 8K
CPU: L2 cache: 512K
CPU: After all inits, caps: bfebfbff 00000000 00000000 00000080
CPU: Intel(R) Xeon(TM) CPU 2.60GHz stepping 07
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Checking 'hlt' instruction... OK.
checking if image is isn't (no cpio magic); looks like an initrd
Freeing initrd memory: 1398k freed
NET: Registered protocol family 16
devfs: 2004-01-31 Richard Gooch (
devfs: boot_options: 0x0
cofuse init 0.1 (API version 2.2)
Initializing Cryptographic API
serio: cokbd at irq 1
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
elevator: using anticipatory as default io scheduler
cobd: loaded (max 32 devices)
loop: loaded (max 8 devices)
conet: loaded (max 16 devices)
conet0: initialized
mice: PS/2 mouse device common for all mice
input: AT Translated Set 2 keyboard on cokbd
NET: Registered protocol family 2
IP: routing cache hash table of 2048 buckets, 16Kbytes
TCP: Hash tables configured (established 16384 bind 32768)
NET: Registered protocol family 1
NET: Registered protocol family 17
RAMDISK: Compressed image found at block 0
EXT2-fs warning: checktime reached, running e2fsck is recommended
VFS: Mounted root (ext2 filesystem).
VFS: Cannot open root device "cobd0" or unknown-block(117,0)
Please append a correct "root=" boot option
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(117,0)
Old 11-17-2005, 05:16 PM   #2
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Hi and welcome to LQ I have moved your thread to Linux-General as this fits better there.
Old 11-19-2005, 06:10 PM   #3
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Hi All,

Found my problem. when i edited the debian.xml file i made a mistake on my typing, all is working now and i'm connecting to the internet. Now i need a desktop does CoLinux have its own, or can anyone suggest a good one Thanks.
Old 12-12-2007, 07:38 AM   #4
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Hi I am trying to use the defualt configuration file and got the same error.

Can you tell me what was the exact problem and how did u fix it.

My configuration file looks like as follows

# This is an example for a configuration file that can
# be passed to colinux-daemon in this manner:
# colinux-daemon @example.conf
# Note that you can still prepend or append configuration and
# boot parameters before and after '@', or you can use more
# that one '@ to load several settings one after another.
# colinux-daemon @example.conf @overrider.conf mem=32
# Full list of config params is listed in colinux-daemon.txt.

# The default kernel

# File contains the root file system.
# Download and extract preconfigured file from SF "Images for 2.6".
cobd0="c:\Program Files\coLinux\root_fs"

# Swap device, should be an empty file with 128..512MB.
#cobd1="c:\Program Files\coLinux\swap_device"

# Tell kernel the name of root device (mostly /dev/cobd0,
# /dev/cobd/0 on Gentoo)
# This parameter will be forward to Linux kernel.

# Additional kernel parameters (ro = rootfs mount read only)

# Initrd installs modules into the root file system.
# Need only on first boot.

# Maximal memory for linux guest

# Slirp for internet connection (outgoing)
# Inside running coLinux configure eth0 with this static settings:
# ipaddress broadcast netmask
# gateway nameserver

# Tuntap as private network between guest and host on second linux device

# Setup for serial device
#ttys0=COM1,"BAUD=115200 PARITY=n DATA=8 STOP=1 dtr=on rts=on"

# Run an application on colinux start (Sample Xming, a Xserver)
#exec0=C:\Programs\Xming\Xming.exe,":0 -clipboard -multiwindow -ac"

Last edited by manju_pnaik; 12-12-2007 at 07:39 AM.
Old 12-12-2007, 06:19 PM   #5
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You haven't edited it to show the fs and swap files:

cobd0="c:\Program Files\coLinux\root_fs"
and the swap:

cobd1="c:\Program Files\coLinux\swap_device"
Put the filesystem and swap details in and remove the hash marks.

When I tried coLinux recently I used the Debian-4.0r0-etch.ext3.1gb, and the swap_512Mb file.


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