[uml-user] mount: cannot remount block device /dev/ubda read-write, is write-protected

[kail-gj <an_...@12...>]

Hi, 
    I build my UML linux from source and build my filesystem using mkrootfs tools, and run with ./linux ubda=../../rfs-1/root_fs mem=512m.
    I changed my mkrootfs one line from 
            addline etc/fstab               "/dev/ubd/0      /               ext2    defaults 1 1"
    to
            addline etc/fstab               "/dev/ubda      /               ext2    defaults 0 0"
    to solve the other problem "[/sbin/fsck.ext2 (1) -- /] fsck.ext2 -a /dev/ubd/0".
    Now a new problem troubles me. The boot log is with "
RQ 10/winch: IRQF_DISABLED is not guaranteed on shared IRQs
Welcome to Red Hat Enterprise Linux Server
Starting udev: modprobe: FATAL: Could not load /lib/modules/2.6.32.8/modules.dep: No such file or directory


line_ioctl: tty0: unknown ioctl: 0x541e
[  OK  ]
Setting hostname localhost:  [  OK  ]
Checking filesystems
Checking all file systems.
[  OK  ]
Remounting root filesystem in read-write mode:  mount: cannot remount block device /dev/ubda read-write, is write-protected
[FAILED]
can't create lock file /etc/mtab~408: Read-only file system (use -n flag to override)
Mounting local filesystems:  [FAILED]
touch: cannot touch `/.autorelabel': Read-only file system
touch: cannot touch `/var/lib/random-seed': Read-only file system
chmod: cannot access `/var/lib/random-seed': No such file or directory
rm: cannot remove `/var/run/utmp': Read-only file system
/etc/rc.d/rc.sysinit: line 597: /var/run/utmp: Read-only file system
touch: cannot touch `/var/log/wtmp': Read-only file system
/etc/rc.d/rc.sysinit: line 594: plymouth: command not found
chgrp: changing group of `/var/run/utmp': Read-only file system
chgrp: changing group of `/var/log/wtmp': Read-only file system
chmod: changing permissions of `/var/run/utmp': Read-only file system
chmod: changing permissions of `/var/log/wtmp': Read-only file system
chown: cannot access `/tmp/.ICE-unix': No such file or directory
Enabling /etc/fstab swaps:  [  OK  ]
modprobe: FATAL: Could not load /lib/modules/2.6.32.8/modules.dep: No such file or directory


/etc/rc.d/rc.sysinit: line 654: /var/log/dmesg: Read-only file system
/etc/rc.d/rc.sysinit: line 659: plymouth: command not found
IRQ 10/winch: IRQF_DISABLED is not guaranteed on shared IRQs
modprobe: FATAL: Could not load /lib/modules/2.6.32.8/modules.dep: No such file or directory


IRQ 10/winch: IRQF_DISABLED is not guaranteed on shared IRQs
Entering non-interactive startup
FATAL: Could not load /lib/modules/2.6.32.8/modules.dep: No such file or directory
Bringing up loopback interface:  [  OK  ]
Bringing up interface eth0:  Device eth0 does not seem to be present, delaying initialization.
[FAILED]
FATAL: Could not load /lib/modules/2.6.32.8/modules.dep: No such file or directory
touch: cannot touch `/var/lock/subsys/network': Read-only file system
awk: cmd. line:1: fatal: cannot open file `/etc/mtab' for reading (No such file or directory)
xterm_open : run_helper failed, errno = 2
Failed to open console 2, err = -2
xterm_open : run_helper failed, errno = 2
Failed to open console 3, err = -2
xterm_open : run_helper failed, errno = 2
Failed to open console 5, err = -2
xterm_open : run_helper failed, errno = 2
Failed to open console 1, err = -2
xterm_open : run_helper failed, errno = 2
Failed to open console 6, err = -2
xterm_open : run_helper failed, errno = 2
Failed to open console 4, err = -2
IRQ 10/winch: IRQF_DISABLED is not guaranteed on shared IRQs
init: tty (/dev/tty2) main process (571) terminated with status 1
IRQ 10/winch: IRQF_DISABLED is not guaranteed on shared IRQs
init: tty (/dev/tty2) main process ended, respawning
xterm_open : run_helper failed, errno = 2
"
    Any suggestion or hints is much appreciated.


    @Toralf Forster, I find you had met the same problem and how did you solve it finally?


Jotus.


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>From: Toralf Förster <toralf.foerster@gm...> - 2012-10-25 19:41:18
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>-----BEGIN PGP SIGNED MESSAGE-----
>Hash: SHA1

>I cloned a 1.2 GB UML file w/ ext3 fs (Gentoo Linux) into a 2.0 GB bigger file with ext4. Trying to boot the >image however I always get :

>...
> [ ok ]
> * Checking local filesystems  ...
>stable: clean, 81157/122160 files, 265527/488281 blocks
> [ ok ]
> * Remounting root filesystem read/write ...
>mount: cannot remount block device /dev/ubda read-write, is write-protected
> * Root filesystem could not be mounted read/write
 



>probably PEBKAC - but what I missed ????
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