Description of problem:
USB disks formatted with GNOME disk utility (after having a liveCD image on them previously) as FAT16 disks are mounted read-only. Tried with several keys.
Always, many different keys.
Steps to Reproduce:
1. Use a key for a bootable liveCD image, then decide to use it for file transfer with a 3rd party, requiring a FAT partition
2. Open GNOME Disks, unmount liveCD partition un the utility, format disk, add a partition to the newly formated disk
3. Mount new partition and open it in Nautilus. Try to copy files
Files fail to copy - partition is read-only. Boot options to mount look fine (see below). Attempts to change permissions on directory fail. Perhaps an SELinux issue?
Expect to have files copied.
Mount command line: /dev/sdb1 on /run/media/dneary/New Volume type vfat (rw,nosuid,nodev,relatime,uid=1000,gid=1000,fmask=0022,dmask=0077,codepage=cp437,iocharset=ascii,shortname=mixed,showexec,utf8,errors=remount-ro,uhelper=udisks2)
Additional information: As root, in the shell, I can copy files to the disk. So it is a security context issue, rather than a filesystem mounted read-only. Perhaps an SELinux issue?
This also happens with existing USB disks. And has only started happening recently on F17.
I don't think this has anything to do with udisks2 as it is just calling the mount(8) command. It could be a problem with either the USB stick or the filesystem driver in the kernel or the kernel or anything else. Maybe see if you can reproduce by just mounting the device from the command line?
Anyway, closing as CANTFIX. But feel free to reopen and reassign it to another component if you find a suitable one.