def rm_disk(self, disk_path):
if os.path.islink(disk_path):
disk_path = os.path.realpath(disk_path)
hdd_group = LinearTable(self.group_name, root_helper=self.root_helper)
assert hdd_group.existed, "Group %s dose NOT exist..." % self.group_name
disk = hdd_group.find_disk(disk_path)
dm = Dmsetup(root_helper=self.root_helper)
cached_name = self._cached_disk_name(disk.dev)
cache_name = self._cache_name()
cache_dev = dm.mapdev_prefix + cache_name
cache_table = dm.get_table(cache_name)
fc = Flashcache(root_helper=self.root_helper)
block_size = fc.get_block_size(cache_table)
start_blk, offset_blk = utils.sector_offset2block_offset(disk.start, disk.size, block_size)
fc.invalid(cache_dev, start_blk, offset_blk)
dm.remove_table(cached_name)
hdd_group.remove_disk(disk)
