I had a nice working multiple booting system on my Mac Book Air with the following partition table:
Partition 1: Primary - HFS - Bootloader (set as active)
Partition 2: Primary - NTFS - Windows 8
Partition 3: Extended partition (rest of my hard disk was this extended partition containing logical partitions as following)
Partition 4: Logical - HFS - Mountain Lion
Partition 5: Logical - EXT4 - Debian
Partition 6: Logical - EXT4 - Ubuntu
Partition 7: Logical - NTFS - DATA
Partition 8: Logical - HFS - Snow Leopard
Note: Partitions 4-8 are inside Partition 3 (extended).
Now as I had some troubles hibernating Windows 8, after reading that I have to set Windows partition as active, I went ahead and used Disk Management program and set Partition 2 as active (before it was Partition 1 as mentioned above).
And bammm, Partitions 4, 5, 6 and 7 are lost!!!! This is so bad, Microsoft! I just wanted to make a partition active, that's it... and now my other operating systems and more importantly the Data I had on partition 7 is gone!
Can someone please help me? Are there any chances to get the partition table data back? I have another system that has Linux and Mac OSX if that's needed for recovery. Please help.
P.S. The weird thing is that, as a result of this, all extended partitions seem to be affected except the last one (Partition 8) and I can confirm that it boots and I have a functioning Snow Leopard there... but Partitions 4, 5, 6 and 7 are gone like they never existed before!