DM_ERA_METADATA_BLOCK_SIZE
(unsigned int) (DM_ERA_METADATA_BLOCK_SIZE >> SECTOR_SHIFT),
disk->metadata_block_size = cpu_to_le32(DM_ERA_METADATA_BLOCK_SIZE >> SECTOR_SHIFT);
md->bm = dm_block_manager_create(md->bdev, DM_ERA_METADATA_BLOCK_SIZE,