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it was 'third' partition I mistakenly wrote 'second'.
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Arash
Arash
  • 131
  • 6

I know it's while I opened this thread but I finally understand what is the problem and how to fix it.

The problem is that after merging the partitions the Disk Utility somehow destroyed the partition type (APFS partition), and changed it to 'FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFF'. There was similar questions related to my issue here and here.

I imaged the whole disk and installed the OS from scratch and with the instructions mentioned in the links I managed to mount the image and access my data. But it was possible to fix the problem without reinstalling and imaging.

Anyway here is the commands I used after installing new OS to solve the issue on the disk image.

First mount the raw image (I imaged the disk with dd).

sudo hdiutil attach -imagekey diskimage-class=CRawDiskImage -nomount hard.dmg

here is my output, as you can see the secondthird partition type is invalid.

/dev/disk3 GUID_partition_scheme /dev/disk3s1 EFI /dev/disk3s2 FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFF

Get information about disk layout and start and size of each partitions.

sudo gpt -r show /dev/disk3

here is the output

 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 927867256 2 GPT part - FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF 928276896 48828131 977105027 32 Sec GPT table 977105059 1 Sec GPT header

So I just need to remove the secondthird partition and add it again with the right GUID, I also used the start and size from previous command. the GUID for APFS partition is 7C3457EF-0000-11AA-AA11-00306543ECAC.

gpt remove -i 2 /dev/disk3 gpt add -i 2 -b 409640 -s 927867256 -t 7C3457EF-0000-11AA-AA11-00306543ECAC disk3

I know it's while I opened this thread but I finally understand what is the problem and how to fix it.

The problem is that after merging the partitions the Disk Utility somehow destroyed the partition type (APFS partition), and changed it to 'FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFF'. There was similar questions related to my issue here and here.

I imaged the whole disk and installed the OS from scratch and with the instructions mentioned in the links I managed to mount the image and access my data. But it was possible to fix the problem without reinstalling and imaging.

Anyway here is the commands I used after installing new OS to solve the issue on the disk image.

First mount the raw image (I imaged the disk with dd).

sudo hdiutil attach -imagekey diskimage-class=CRawDiskImage -nomount hard.dmg

here is my output, as you can see the second partition type is invalid.

/dev/disk3 GUID_partition_scheme /dev/disk3s1 EFI /dev/disk3s2 FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFF

Get information about disk layout and start and size of each partitions.

sudo gpt -r show /dev/disk3

here is the output

 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 927867256 2 GPT part - FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF 928276896 48828131 977105027 32 Sec GPT table 977105059 1 Sec GPT header

So I just need to remove the second partition and add it again with the right GUID, I also used the start and size from previous command. the GUID for APFS partition is 7C3457EF-0000-11AA-AA11-00306543ECAC.

gpt remove -i 2 /dev/disk3 gpt add -i 2 -b 409640 -s 927867256 -t 7C3457EF-0000-11AA-AA11-00306543ECAC disk3

I know it's while I opened this thread but I finally understand what is the problem and how to fix it.

The problem is that after merging the partitions the Disk Utility somehow destroyed the partition type (APFS partition), and changed it to 'FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFF'. There was similar questions related to my issue here and here.

I imaged the whole disk and installed the OS from scratch and with the instructions mentioned in the links I managed to mount the image and access my data. But it was possible to fix the problem without reinstalling and imaging.

Anyway here is the commands I used after installing new OS to solve the issue on the disk image.

First mount the raw image (I imaged the disk with dd).

sudo hdiutil attach -imagekey diskimage-class=CRawDiskImage -nomount hard.dmg

here is my output, as you can see the third partition type is invalid.

/dev/disk3 GUID_partition_scheme /dev/disk3s1 EFI /dev/disk3s2 FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFF

Get information about disk layout and start and size of each partitions.

sudo gpt -r show /dev/disk3

here is the output

 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 927867256 2 GPT part - FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF 928276896 48828131 977105027 32 Sec GPT table 977105059 1 Sec GPT header

So I just need to remove the third partition and add it again with the right GUID, I also used the start and size from previous command. the GUID for APFS partition is 7C3457EF-0000-11AA-AA11-00306543ECAC.

gpt remove -i 2 /dev/disk3 gpt add -i 2 -b 409640 -s 927867256 -t 7C3457EF-0000-11AA-AA11-00306543ECAC disk3
Source Link
Arash
Arash
  • 131
  • 6

I know it's while I opened this thread but I finally understand what is the problem and how to fix it.

The problem is that after merging the partitions the Disk Utility somehow destroyed the partition type (APFS partition), and changed it to 'FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFF'. There was similar questions related to my issue here and here.

I imaged the whole disk and installed the OS from scratch and with the instructions mentioned in the links I managed to mount the image and access my data. But it was possible to fix the problem without reinstalling and imaging.

Anyway here is the commands I used after installing new OS to solve the issue on the disk image.

First mount the raw image (I imaged the disk with dd).

sudo hdiutil attach -imagekey diskimage-class=CRawDiskImage -nomount hard.dmg

here is my output, as you can see the second partition type is invalid.

/dev/disk3 GUID_partition_scheme /dev/disk3s1 EFI /dev/disk3s2 FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFF

Get information about disk layout and start and size of each partitions.

sudo gpt -r show /dev/disk3

here is the output

 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 927867256 2 GPT part - FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF 928276896 48828131 977105027 32 Sec GPT table 977105059 1 Sec GPT header

So I just need to remove the second partition and add it again with the right GUID, I also used the start and size from previous command. the GUID for APFS partition is 7C3457EF-0000-11AA-AA11-00306543ECAC.

gpt remove -i 2 /dev/disk3 gpt add -i 2 -b 409640 -s 927867256 -t 7C3457EF-0000-11AA-AA11-00306543ECAC disk3