Re: [uml-user] problems in ubd0 load

[J. C. <jc...@es...>]

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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