Ivans-MacBookPro:~ user$ sudo gpt show /dev/disk4 gpt show: /dev/disk4: Suspicious MBR at sector 0 start size index contents 0 1 MBR 1 1 Pri GPT header 2 32 Pri GPT table 34 6 40 409600 1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B 409640 12207032 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 12616672 263200 12879872 12206080 3 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7 25085952 12207032 4 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 37292984 262144 37555128 12207032 5 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 49762160 262144 50024304 12207032 6 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 62231336 262144 62493480 12207032 7 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 74700512 262432 74962944 12206080 8 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7 87169024 12207032 9 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 99376056 262144 99638200 12207032 10 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 111845232 262144 112107376 12207032 11 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 124314408 262144 124576552 12207032 12 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 136783584 262144 137045728 12207032 13 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 149252760 262144 149514904 12207032 14 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 161721936 262144 161984080 12207032 15 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 174191112 262144 174453256 12207032 16 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 186660288 262144 186922432 8127888 17 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 195050320 262147 195312467 32 Sec GPT table 195312499 1 Sec GPT header Ivans-MacBookPro:~ user$ diskutil umountDisk /dev/disk4 Unmount of all volumes on disk4 was successful Ivans-MacBookPro:~ user$ sudo fdisk -e /dev/disk4 #modify mbr fdisk: could not open MBR file /usr/standalone/i386/boot0: No such file or directory Enter 'help' for information fdisk: 1> print Disk: /dev/disk4 geometry: 12157/255/63 [195312500 sectors] Offset: 0 Signature: 0xAA55 Starting Ending #: id cyl hd sec - cyl hd sec [ start - size] ------------------------------------------------------------------------ 1: EE 1023 254 63 - 1023 254 63 [ 1 - 409639] 2: AF 1023 254 63 - 1023 254 63 [ 409640 - 12207032] HFS+ 3: 0B 1023 254 63 - 1023 254 63 [ 12879872 - 12206080] Win95 FAT-32 4: AF 1023 254 63 - 1023 254 63 [ 25085952 - 12207032] HFS+ fdisk: 1> edit 4 Starting Ending #: id cyl hd sec - cyl hd sec [ start - size] ------------------------------------------------------------------------ 4: AF 1023 254 63 - 1023 254 63 [ 25085952 - 12207032] HFS+ Partition id ('0' to disable) [0 - FF]: [AF] (? for help) 0 Partition 4 is disabled. fdisk:*1> edit 3 Starting Ending #: id cyl hd sec - cyl hd sec [ start - size] ------------------------------------------------------------------------ 3: 0B 1023 254 63 - 1023 254 63 [ 12879872 - 12206080] Win95 FAT-32 Partition id ('0' to disable) [0 - FF]: [B] (? for help) 0 Partition 3 is disabled. fdisk:*1> edit 2 Starting Ending #: id cyl hd sec - cyl hd sec [ start - size] ------------------------------------------------------------------------ 2: AF 1023 254 63 - 1023 254 63 [ 409640 - 12207032] HFS+ Partition id ('0' to disable) [0 - FF]: [AF] (? for help) 0 Partition 2 is disabled. fdisk:*1> edit 1 Starting Ending #: id cyl hd sec - cyl hd sec [ start - size] ------------------------------------------------------------------------ 1: EE 1023 254 63 - 1023 254 63 [ 1 - 409639] Partition id ('0' to disable) [0 - FF]: [EE] (? for help) EE Do you wish to edit in CHS mode? [n] Partition offset [0 - 195312500]: [63] 1 Partition size [1 - 195312499]: [195312499] fdisk:*1> write Writing MBR at offset 0. fdisk: 1> exit Ivans-MacBookPro:~ user$ sudo fdisk /dev/disk4 Disk: /dev/disk4 geometry: 12157/255/63 [195312500 sectors] Signature: 0xAA55 Starting Ending #: id cyl hd sec - cyl hd sec [ start - size] ------------------------------------------------------------------------ 1: EE 0 0 2 - 1023 254 63 [ 1 - 195312499] 2: 00 0 0 0 - 0 0 0 [ 0 - 0] unused 3: 00 0 0 0 - 0 0 0 [ 0 - 0] unused 4: 00 0 0 0 - 0 0 0 [ 0 - 0] unused Ivans-MacBookPro:~ user$ sudo gpt -r show /dev/disk4 start size index contents 0 1 PMBR 1 1 Pri GPT header 2 32 Pri GPT table 34 6 40 409600 1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B 409640 12207032 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 12616672 263200 12879872 12206080 3 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7 25085952 12207032 4 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 37292984 262144 37555128 12207032 5 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 49762160 262144 50024304 12207032 6 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 62231336 262144 62493480 12207032 7 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 74700512 262432 74962944 12206080 8 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7 87169024 12207032 9 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 99376056 262144 99638200 12207032 10 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 111845232 262144 112107376 12207032 11 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 124314408 262144 124576552 12207032 12 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 136783584 262144 137045728 12207032 13 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 149252760 262144 149514904 12207032 14 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 161721936 262144 161984080 12207032 15 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 174191112 262144 174453256 12207032 16 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 186660288 262144 186922432 8127888 17 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 195050320 262147 195312467 32 Sec GPT table 195312499 1 Sec GPT header Ivans-MacBookPro:~ user$