Mount /mnt/scracth with -o sync,nodiscard

"-o discard" issues UNMAP commands to loopback resulting in punch_hole
on the pinned file in /data. That will break the pinned block map.

Bug: 210589189
Signed-off-by: Jaegeuk Kim <jaegeuk@google.com>
Change-Id: Ia927c43fc75164ce5929173f5740737eac4de484
1 file changed