Repairing file system.
Checking Journaled HFS Plus volume.
Checking extents overflow file.
Checking catalog file.
Checking multi-linked files.
Checking catalog hierarchy.
Checking extended attributes file.
Checking volume bitmap.
The volume Toshiba 2 could not be verified completely.
File system check exit code is 8.
Updating boot support partitions for the volume as required.
File system verify or repair failed.
Operation failed…

Started file system repair on disk3s3
Repairing file system
Checking Journaled HFS Plus volume
Checking extents overflow file
Checking catalog file
Checking multi-linked files
Checking catalog hierarchy
Checking extended attributes file
Checking volume bitmap
The volume Toshiba 2 could not be verified completely
File system check exit code is 8
Updating boot support partitions for the volume as required
Error: -69845: File system verify or repair failed
Underlying error: 8: Exec format error

** /dev/rdisk3s3
    Using cacheBlockSize=32K cacheTotalBlock=65536 cacheSize=2097152K.
   Executing fsck_hfs (version hfs-366.30.3).
    Block 2 is not an MDB or Volume Header
    CheckForClean - could not get VHB/MDB at block 975828614
** Checking Journaled HFS Plus volume.
   The volume name is Toshiba 2
** Checking extents overflow file.
** Checking catalog file.
** Rebuilding catalog B-tree.
Extent records for rebuilt file 4:
    [ 65933, 43264 ]
    [ 0, 0 ]
    [ 0, 0 ]
    [ 0, 0 ]
    [ 0, 0 ]
    [ 0, 0 ]
    [ 0, 0 ]
    [ 0, 0 ]
hfs_UNswap_BTNode: invalid node height (1)
btree file 4:  1000 records
btree file 4:  2000 records
btree file 4:  3000 records
btree file 4:  4000 records
btree file 4:  5000 records
btree file 4:  6000 records
btree file 4:  7000 records
btree file 4:  8000 records
btree file 4:  9000 records
btree file 4:  10000 records
btree file 4:  11000 records
btree file 4:  12000 records
btree file 4:  13000 records
btree file 4:  14000 records
btree file 4:  15000 records
btree file 4:  16000 records
btree file 4:  17000 records
btree file 4:  18000 records
btree file 4:  19000 records
btree file 4:  20000 records
btree file 4:  21000 records
btree file 4:  22000 records
btree file 4:  23000 records
** Rechecking volume.
** Checking Journaled HFS Plus volume.
   The volume name is Toshiba 2
** Checking extents overflow file.
** Checking catalog file.
** Checking multi-linked files.
** Checking catalog hierarchy.
** Checking extended attributes file.
** Checking volume bitmap.
** The volume Toshiba 2 could not be verified completely.
    volume check failed with error 5
    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
    CheckHFS returned 5, fsmodified = 1