Problem with data recovery

[Eric Sandeen]

On 10/18/15 9:49 AM, Matteo Sarti wrote:
> I have a buffalo terastation with both two failed drive on 4 drives of raid 5.
> Problem is very simple hardware is ok, but someone goes wrong during normal process of this dataserver.

I don't understand what that means - how can you have two failed drives, but hardware is ok?

If you lost 2 drives out of a 3+1 RAID5, then you have essentially lost your filesystem,
I'm sorry.

> I check both driver on other PC with ufs explorer and drive is full of data, but xfs file system is not recognized.

because the drives are part of a raid set, and they are not xfs filesystems
on their own.

https://en.wikipedia.org/wiki/Standard_RAID_levels#RAID_5

> How can I write manually on harddrive using raw data the beginning of xfs definition??

You can't.

> I hope someone can help me because buffalo is very good in selling, but not so much in Support :(.

If you lost 2 of your 4 drives, there's not much support to do, I'm afraid.

-Eric