Re: [uml-user] problems in ubd0 load

[gowri s. <gow...@ya...>]

Hi,
I tried giving root=/dev/ubd/0 in the command line
still I'm getting the same error message. :-(
Or is there somewhere else I need to set this option.
Sorry for this naive question.
Thanks
Gowri


--- "J. Cone" <jc...@es...> wrote:
> When I changed to root=/dev/ubd/0  (in kernel
> 2.5-test5) I stopped getting 
> this error message.  I guess /dev has changed.
> 
> At 15:59 3/11/2003 -0800, gowri shankar wrote:
> >The UML doesn't load and gives the following
> problem
> >'VFS: Cannot open root device "ubd0" or 62:00'
> >
> >I was working with the 2.4.18um which didn't give
> any
> >problems. But once I upgraded the kernel to 2.4.22
> I
> >cannot load the UML :-( I tried searching the
> mailing
> >list for the problem But I could not solve it
> >
> >I execute linux through
> >./linux ubd0=cowfs,root_fs mode=tt eth0=daemon
> >
> >Any inputs in this will be very helpful. I don't
> know
> >what mistake I'm making.
> >
> >This is the Output:
> >-------------------
> >
> >tracing thread pid = 23097
> >Linux version 2.4.22-5um (gshankar@moretti) (gcc
> >version 2.95.4 20011002 (Debian prerelease)) #8 Mon
> >Nov 3 16:47:47 CST 2003
> >On node 0 totalpages: 8192
> >zone(0): 8192 pages.
> >zone(1): 0 pages.
> >zone(2): 0 pages.
> >Kernel command line: ubd0=cowfs,root_fs mode=tt
> >eth0=daemon root=/dev/ubd0
> >Calibrating delay loop... 758.46 BogoMIPS
> >Memory: 29132k available
> >Dentry cache hash table entries: 4096 (order: 3,
> 32768
> >bytes)
> >Inode cache hash table entries: 2048 (order: 2,
> 16384
> >bytes)
> >Mount cache hash table entries: 512 (order: 0, 4096
> >bytes)
> >Buffer cache hash table entries: 1024 (order: 0,
> 4096
> >bytes)
> >Page-cache hash table entries: 8192 (order: 3,
> 32768
> >bytes)
> >Checking for host processor cmov support...Yes
> >Checking for host processor xmm support...No
> >Checking that ptrace can change system call
> >numbers...OK
> >Checking that host ptys support output SIGIO...Yes
> >Checking that host ptys support SIGIO on
> close...No,
> >enabling workaround
> >POSIX conformance testing by UNIFIX
> >Linux NET4.0 for Linux 2.4
> >Based upon Swansea University Computer Society
> >NET3.039
> >Initializing RT netlink socket
> >Starting kswapd
> >devfs: v1.12c (20020818) Richard Gooch
> >(rg...@at...)
> >devfs: boot_options: 0x1
> >pty: 256 Unix98 ptys configured
> >SLIP: version 0.8.4-NET3.019-NEWTTY (dynamic
> channels,
> >max=256).
> >loop: loaded (max 8 devices)
> >PPP generic driver version 2.4.2
> >Universal TUN/TAP device driver 1.5 (C)1999-2002
> Maxim
> >Krasnyansky
> >SCSI subsystem driver Revision: 1.00
> >blkmtd: error: missing `device' name
> >
> >Initializing software serial port version 1
> >Netdevice 0 : daemon backend (uml_switch version 3)
> -
> >unix:/tmp/uml.ctl
> >mconsole (version 2) initialized on
> >/u/gshankar/.uml/MlJjKZ/mconsole
> >Failed to lock 'cowfs', err = 13
> >unable to open cowfs for validation
> >UML Audio Relay (host dsp = /dev/sound/dsp, host
> mixer
> >= /dev/sound/mixer)
> >Initializing stdio console driver
> >NET4: Linux TCP/IP 1.0 for NET4.0
> >IP Protocols: ICMP, UDP, TCP
> >IP: routing cache hash table of 512 buckets,
> 4Kbytes
> >TCP: Hash tables configured (established 2048 bind
> >2048)
> >NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
> >VFS: Cannot open root device "ubd0" or 62:00
> >Please append a correct "root=" boot option
> >Kernel panic: VFS: Unable to mount root fs on 62:00
> >
> >Thanks
> >Gowri
> >
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