Overwritten partition table

How to use TestDisk to recover lost partition
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PsyChoRo
Posts: 4
Joined: 30 Mar 2015, 11:46

Overwritten partition table

#1 Post by PsyChoRo » 30 Mar 2015, 11:51

Hello everyone,

Everything started after a BIOS update which made 2 out of 4 disk non-member disks.
Found some instructions here: http://www.overclock.net/t/478557/howto ... disk-error
My main mistake was that it was late in the night when I tried to recover it and since I was in panic mode, I didn't read everything with full attention, and that is of course my mistake.

I will tell you what I have done and perhaps you let me know what are the chances of getting anything back.

First of all my setup is

4x4TB drives in Intel RAID5, H87 chipset

I had two non-member disks
Made all of them non-member disks then recreated the RAID array with the same name, cluster size, order, everything.
Booted into windows, nothing
Started TestDisk, selected Intel instead of GPT
Quick search found a partition, I have only 1 anyway, and I chose to write the partition info
Rebooted
Booted into windows, still drive unavailable

Moved the RAID to another PC, again two disks were non-member,
Did the same procedure as above [remove member disks and recreated the RAID5]
Booted into windwos

Started TestDisk, selected Intel instead of GPT
Quick search found a partition, I have only 1 anyway, and I chose to write the partition info
Rebooted
Quick search found a partition, looked at the files and I saw just a bunch of directories, not all but didn't give it a lot of thought, and I chose to write the partition info
Rebooted
Booted into windows, still drive unavailable

Now, I realize my biggest mistake was chosing Intel over GPT, as the program initially suggested, but I simply didn't read that. I wasn't ignoring it, I simply didn't see it.

Now, I'm in deeper search in hope of fixing everything but at this point I lost all hope. I think I messed everything up.

Thanks for your attention.
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cgrenier
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Re: Overwritten partition table

#2 Post by cgrenier » 30 Mar 2015, 17:23

Select EFI GPT, in Advanced, is your partition listed with the correct size ?
If it's ok, choose Boot, BackupBS, confirm, Quit
If it's not the case, choose Analyse, Quick Search, Stop, Deeper Search, Stop, if the partition is found, set it as P(rimary), on next screen, choose Write, confirm, Quit

PsyChoRo
Posts: 4
Joined: 30 Mar 2015, 11:46

Re: Overwritten partition table

#3 Post by PsyChoRo » 30 Mar 2015, 18:34

Thank you for taking the time to reply.

Should I delete from Windows the RAW partition first?
hdd1.PNG
hdd1.PNG (93.31 KiB) Viewed 617 times
As a side note: this storage was only used as Storage so I guess the Start sector should be a very low number, correct ?
hdd3.PNG
hdd3.PNG (36.34 KiB) Viewed 617 times
This is after the quick search.

When I go to list files/folders, I only get a few folders and pretty much nothing inside of them.

Under deeper search, I get the initial screenshot I posted in the first post.

Looking forward to your advice,
Thanks again.

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