Re: First 12Mb of data missing after accidental deletion of first drive (4 2TB raid5)

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sorry i pasted the wrong email:
Hi,

I have a problem with my 4 2TB disk Raid5 (most likely btrfs) after I
accidentally deleted first drive by installing Ubuntu on it (/dev/sda
automatic choice) then I discovered the raid isn't working and by
closer inspecting it hexdump I discovered first ~12Mb of data are
missing. Is it possible to recover it somehow? What I did was to zero
superblock then add the first drive - everything seems fine according
to /proc/mdstat.

On Tue, Oct 13, 2015 at 4:04 PM, Marek <mlf.conv@xxxxxxxxx> wrote:
> no, i had a working raid consisting of 4 2TB drives (raid5)
> sda,sdb,sdc,sdb ( no partitions were created on drives) - then i
> accidentally deleted /dev/sda by installing ubuntu. when inspecting
> dev/md127 with a hex editor i discovered first 12mb are missing.
>
> On Tue, Oct 13, 2015 at 3:53 PM, Alexander Afonyashin
> <a.afonyashin@xxxxxxxxxxxxxx> wrote:
>> Hi Marek,
>>
>> Do you mean you have files (on raid) that were used as loop devices?
>>
>> Regards,
>> Alexander
>>
>> On Tue, Oct 13, 2015 at 4:44 PM, Marek <mlf.conv@xxxxxxxxx> wrote:
>>> Hi,
>>>
>>> I'd like to ask about recovering partitions saved as images on eg a raid.
>>> How do I recover such image - I tried to run test disk and it found
>>> lots of images which I wasn't able to view via P (NFTS) and ext3
>>> partitions but I'd like to save them to another harddrive, I tried
>>> photo tree with only ext3 superblock and image file enabled but it
>>> wouldn't find the partition in was looki for and found via testdisk.
>>> What would you recommend me to do?
>>>
>>> Marek
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