fsck.hfsplus -fryd /dev/sdf3
** /dev/sdf3
	Using cacheBlockSize=32K cacheTotalBlock=1024 cacheSize=32768K.
** Checking HFS Plus volume.
** Checking Extents Overflow file.
** Checking Catalog file.
** Rebuilding Catalog B-tree.
hfs_UNswap_BTNode: invalid node height (1)
** Rechecking volume.
** Checking HFS Plus volume.
** Checking Extents Overflow file.
** Checking Catalog file.
   Missing thread record (id = 94)
   Missing thread record (id = 175)
   Missing thread record (id = 536)
   Missing thread record (id = 826)
   Missing thread record (id = 1391)
   Missing thread record (id = 1706)
   Missing thread record (id = 1756)
   Missing thread record (id = 5732)
   Missing thread record (id = 6517)
   Missing thread record (id = 7120)
   Missing thread record (id = 7225)
   Missing thread record (id = 7753)
   Missing thread record (id = 9260)
   Missing thread record (id = 9677)
   Missing thread record (id = 10569)
   Missing thread record (id = 21087)
   Missing thread record (id = 23290)
   Missing thread record (id = 31898)
   Missing thread record (id = 32659)
   Missing thread record (id = 33372)
   Missing thread record (id = 36321)
   Missing thread record (id = 56434)
   Incorrect number of thread records
(4, 219)
	CheckCatalogBTree: dirCount = 579, dirThread = 568
   Incorrect number of thread records
(4, 219)
	CheckCatalogBTree: fileCount = 7957, fileThread = 7550
** Checking Catalog hierarchy.
** Volume check failed.
volume check failed with error 2 
	volume type is pure HFS+ 
	primary MDB is at block 0 0x00 
	alternate MDB is at block 0 0x00 
	primary VHB is at block 2 0x02 
	alternate VHB is at block 975828614 0x3a29f686 
	sector size = 512 0x200 
	VolumeObject flags = 0x07 
	total sectors for volume = 975828616 0x3a29f688 
	total sectors for embedded volume = 0 0x00