user-mode-linux-user

[uml-user] problems in ubd0 load

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

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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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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>The New Yahoo! Shopping - with improved product search
>http://shopping.yahoo.com
>
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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
> >
> >__________________________________
> >Do you Yahoo!?
> >The New Yahoo! Shopping - with improved product
> search
> >http://shopping.yahoo.com
> >
> >
>
>-------------------------------------------------------
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> Does it
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> 
> 
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-------------------------------------------------------
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Re: [uml-user] problems in ubd0 load

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

Hello Gowri,

I'm really fairly ignorant, but I'll have another go

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

What result do you get, if you
   wc cowfs
   touch cowfs
   ls -l cowfs

If any of these fail, then those errors probably need to be resolved before 
uml can be happy.
None of these command lines explicitly tests file locking, or writing, but 
those things need to work as well.

Regards,
James.

At 07:35 5/11/2003 -0800, gowri shankar wrote:
>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
> > >
> > >__________________________________
> > >Do you Yahoo!?
> > >The New Yahoo! Shopping - with improved product
> > search
> > >http://shopping.yahoo.com
> > >
> > >
> >
> >-------------------------------------------------------
> > >This SF.net email is sponsored by: SF.net Giveback
> > Program.
> > >Does SourceForge.net help you be more productive?
> > Does it
> > >help you create better code?   SHARE THE LOVE, and
> > help us help
> > >YOU!  Click Here: http://sourceforge.net/donate/
> > >_______________________________________________
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> > >Use...@li...
> >
> >https://lists.sourceforge.net/lists/listinfo/user-mode-linux-user
> >
> >
> >
> >
>-------------------------------------------------------
> > This SF.net email is sponsored by: SF.net Giveback
> > Program.
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> > Does it
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>
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Re: [uml-user] problems in ubd0 load

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

Hello Cone

The cowfs is the new COW file for the existing share
root_fs. I think the COW file will be created by the
driver if it doesn't exist.
SO after I run the UML and which fails:
> wc cowfs
0       0       0 cowfs

ls -l
-rw-r--r--    1 gshankar people          0 Nov  6
09:31 cowfs

AND for root_fs

>wc root_fs
 359513 1915884 104857600 root_fs

gshankar@moretti:~/src/uml/manet/linux-2.4.22$ ls -l
root_fs
-rwxrwxrwx    1 gshankar people   104857600 Nov  6
09:23 root_fs*


The file system works fine with the 2.4.18 kernel. But
when I built for the 2.4.22 kernel I'm having this
problems. I don't know What mistake I'm doing.

Thanks
Gowri





--- "J. Cone" <jc...@es...> wrote:
> Hello Gowri,
> 
> I'm really fairly ignorant, but I'll have another go
> 
> 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
> 
> What result do you get, if you
>    wc cowfs
>    touch cowfs
>    ls -l cowfs
> 
> If any of these fail, then those errors probably
> need to be resolved before 
> uml can be happy.
> None of these command lines explicitly tests file
> locking, or writing, but 
> those things need to work as well.
> 
> Regards,
> James.
> 
> At 07:35 5/11/2003 -0800, gowri shankar wrote:
> >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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