[Bug 492301] Re: Can not mount /dev/loop1 on /cow

[Jon Bailey]

Still affects Ubuntu 11.10, following exact directions from ubuntu.com
site for creating a live USB.

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Title:
  Can not mount /dev/loop1 on /cow

Status in “usb-creator” package in Ubuntu:
  Fix Released

Bug description:
  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
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