Just used the dreaded newer Disk Utility to merge two smaller partitions. It seemed that the operation caused my main 1.5TB partition, last on the disk to reappear, empty, with the name of one of the smaller partitions.
Also a Recovery partition 600MB seems to have appeared and is now the last one on disk.
The old disk utility would never do this... I never asked for this recovery partition but here it is... I have a feeling that the merging went fine but it's the adding of the Recovery partition that screwed things up.
My files are there, I had about 1TB of data on it, about 2/3 of the space was occupied.
Any advice on how to recover from this? I plan to image the drive so I can dig into it safely.
I deleted the empty 1.5tb partition in an effort to have test disk search the free space for info. Now it seems the larger partition is gone too.
The files I had on the main partition were very few and huge. There were about 7 files one was 287Gb and so on...
diskutil list /dev/disk2 (external, physical): #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *2.0 TB disk2 1: EFI EFI 209.7 MB disk2s1 2: Apple_HFS 64 - 1 64.0 GB disk2s2 sudo gpt -r show disk2 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 125000000 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC 125409640 3781619495 3907029135 32 Sec GPT table 3907029167 1 Sec GPT header