Comment 3 for bug 274076

I hope I am testing this the right way: I created a USB stick with usb-creator, and booted by using F6 to add the "persistent" option to the kernel command line. The system was booted into busybox in initramfs.

The casper.log Evan attached has this:

+ mount -o remount,ro /dev/sda1 /cdrom
mount: mounting /dev/sda1 on /cdrom failed: Device or resource busy

When I try the similar command in my busybox environment, I get the same error. /dev/sdX1 (the USB stick is sdc for me) is mounted as both /cdrom and /casper-rw-backing. I suspect that this may be reason the remount doesn't work. It also makes unmounting impossible!