Symbol: FATMIRROR
sys/fs/msdosfs/msdosfs_vfsops.c
644
if ((getushort(b710->bpbExtFlags) & FATMIRROR) != 0)
usr.sbin/makefs/msdos/msdosfs_vfsops.c
167
if ((getushort(b710->bpbExtFlags) & FATMIRROR) == 0)