Public bug reported:

Binary package hint: usb-creator

LiveUSB stick created using this program failed to boot. The size of my
usb stick is 2GB.

The version of usb-creator I have is 0.1.16 (according to synaptic)

1. I created a persistence-enabled 128MB (default value) drive with xubuntu 
9.10 desktop i386 iso image.
The stick booted fine and the OS was running ok.

2. I created a persistence-enabled 1.2GB (max value by pulling the
slider all the way up). The stick fails to boot by giving the message:
'Can not mount /dev/loop1 on /cow'

I have re-verified the checksums of the iso that I was trying to use and
they are fine. I re-tried this particular step thrice and I got the logs
during that third attempt.

Using the instructions at: https://wiki.ubuntu.com/DebuggingCasper , I
got the following in casper.log:

--
Begin: Running /scripts/casper-premount ...
Done.
Done.
/init: line 1: can't open /dev/sr0: No medium found
/init: line 1: can't open /dev/sr0: No medium found
/init: line 1: can't open /dev/sr0: No medium found
/init: line 1: can't open /dev/sr0: No medium found
/init: line 1: can't open /dev/sr0: No medium found
/init: line 1: can't open /dev/sr0: No medium found
/init: line 1: can't open /dev/sr0: No medium found
/init: line 1: can't open /dev/sr0: No medium found
/init: line 1: can't open /dev/sr0: No medium found
/init: line 1: can't open /dev/sr0: No medium found
stdin: error 0
BusyBox v1.13.3 (Ubuntu 1:1.13.3-1ubuntu7) multi-call binary

Usage: mount [flags] DEVICE NODE [-o options,more-options]

Mount a filesystem. Filesystem autodetection requires /proc be mounted.

Options:
        -a              Mount all filesystems in fstab
        -f              don't mount
        -i              Don't call /sbin/mount.<filesystem> helper
        -r              Read-only mount
        -t fs-type      Filesystem type
        -w              Read-write mount (default)
-o option:
        loop            Ignored (loop devices are autodetected)
        [a]sync         Writes are asynchronous / synchronous
        [no]atime       Disable / enable updates to inode access times
        [no]diratime    Disable / enable atime updates to directories
        [no]relatime    Disable / enable atime updates relative to modification 
time
        [no]dev         Allow use of special device files / disallow them
        [no]exec        Allow use of executable files / disallow them
        [no]suid        Allow set-user-id-root programs / disallow them
        [r]shared       Convert [recursively] to a shared subtree
        [r]slave        Convert [recursively] to a slave subtree
        [r]private      Convert [recursively] to a private subtree
        [un]bindable    Make mount point [un]able to be bind mounted
        bind            Bind a directory to an additional location
        move            Relocate an existing mount point
        remount         Remount a mounted filesystem, changing its flags
        ro/rw           Mount for read-only / read-write

There are EVEN MORE flags that are specific to each filesystem
You'll have to see the written documentation for those filesystems

Can not mount /dev/loop1 on /cow
--

** Affects: usb-creator (Ubuntu)
     Importance: Undecided
         Status: New

-- 
Can not mount /dev/loop1 on /cow
https://bugs.launchpad.net/bugs/492301
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