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The method to repair your disk and recover the GUID partition table is related to my answers to similar questions: HFS+ invalid number of allocation blocks and Hard drive no longer accessible.

The method to repair your disk and recover the GUID partition table is related to my answers to similar questions: HFS+ invalid number of allocation blocks and Hard drive no longer accessible.

Finally I have created an Excel sheet to do the math. It's available here.

Finally I have created an Excel sheet to do the math. It's available here.

Additionally there are some fixed sizes and rules that help you to determine some of the sizes as well as some of the starting and the ending blocks of your "deleted" partitions.

Additionally there are some fixed sizes and rules (valid for a logical block size of 512b - the rules for 4096b devices are slightly different) that help you to determine some of the sizes as well as some of the starting and the ending blocks of your "deleted" partitions.