Hello,
   Suppose I have an aufs with two rw-mounted branches. Is it possible to force
   writing to only the second branch, even if does not have the most free
   space?
   Background:
   I have a setup with an SSD as main storage. However, almost never I want to
   write   to  this  SSD.  So  I  mount  this  with  "mount  -t  aufs  -o
   br=/tmpfs=rw:/ssddisk=ro none / " . This ensures that writes are done to a
   tmpfs.
   When  I  do  want  to  write  to  disk,  I  do  a   "mount  -t aufs -o
   remount,mod:ssddisk=rw none /".  However, this still writes to /tmpfs as it
   is  the  first branch. When I add "create=mfs", this only writes to my
   /ssddisk while it has more free space than the /tmpfs. Remounting /tmpfs to
   ro is also not an option, as I get an E_BUSY error message.
   Thanks,
   David
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