Re: [uml-user] linux-2.6.0-test5 - VFS: Cannot open root device "udb/0" or unknown-block(0,0)

J. Cone wrote:

> I'm even more of a newbie.
>
> To get an 'unknown partition type' error in uml-2.6.0-test5-1, I need 
> another argument, ubd0=<name of file with a file-system image> eg the 
> decompress of root-fs-toms*.bz2
> Does adding a ubd0= argument help?
No, adding a ubd0= seems to have no effect.

Could this be caused by a wrong setting in the kernel config? For 
example, do the ubd arguments need to be 'y' rather than 'm', or 
something along those lines?
> At 13:59 30/09/2003 -0400, Paul Wujek wrote:
>
> > Having followed the advice in the FAQ I still get this error, does 
> > anyone know what I might have done wrong?
> > Host kernel is linux-2.4.21-0.13mdk (with SKAS patch).
> >
> > I have tried with different root_fs's, homemade, and downloaded with 
> > the same results.
> > -------------------------------------------------------
> > $ ./linux root=/dev/udb/0
> > Checking for the skas3 patch in the host...found
> > Checking for /proc/mm...found
> > Linux version 2.6.0-test5-1um (paul@localhost) (gcc version 3.2.2 
> > (Mandrake Linux 9.1 3.2.2-3mdk)) #1 Mon Sep 29 16:15:36 EDT 2003
> > On node 0 totalpages: 8192
> > DMA zone: 8192 pages, LIFO batch:2
> > Normal zone: 0 pages, LIFO batch:1
> > HighMem zone: 0 pages, LIFO batch:1
> > Building zonelist for node : 0
> > Kernel command line: root=/dev/udb/0
> > PID hash table entries: 16 (order 4: 128 bytes)
> > Memory: 29264k available
> > Calibrating delay loop... 131.48 BogoMIPS
> > Dentry cache hash table entries: 4096 (order: 2, 16384 bytes)
> > Inode-cache hash table entries: 2048 (order: 1, 8192 bytes)
> > Mount-cache hash table entries: 512 (order: 0, 4096 bytes)
> > -> /dev
> > -> /dev/console
> > -> /root
> > 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
> > NET: Registered protocol family 16
> > pty: 256 Unix98 ptys configured
> > Initializing software serial port version 1
> > mconsole (version 2) initialized on /home/paul/.uml/Z9A80s/mconsole
> > Mapper v0.1
> > mmapper_init - find_iomem failed
> > ubd : Synchronous mode
> > UML Audio Relay (host dsp = /dev/sound/dsp, host mixer = 
> > /dev/sound/mixer)
> > Initializing stdio console driver
> > VFS: Disk quotas dquot_6.5.1
> > devfs: v1.22 (20021013) Richard Gooch (rgooch@xxxxxxxxxxxxx)
> > devfs: boot_options: 0x0
> > RAMDISK driver initialized: 16 RAM disks of 32000K size 1024 blocksize
> > NET: Registered protocol family 2
> > IP: routing cache hash table of 512 buckets, 4Kbytes
> > TCP: Hash tables configured (established 2048 bind 4096)
> > NET: Registered protocol family 1
> > Using anticipatory scheduling io scheduler
> > /dev/ubd/disc0: unknown partition table
> > VFS: Cannot open root device "udb/0" or unknown-block(0,0)
> > Please append a correct "root=" boot option
> > Kernel panic: VFS: Unable to mount root fs on unknown-block(0,0)
> >
> > --
> > Paul Wujek
--

Paul Wujek





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