Raid 5 data recovery

[dtschoolit]

Hello,

I attempting recovery (irecover pro) of a 3 disk raid 5 array ext md (netgear ready nas pro) with one disk missing.

I enabled md in the options before the scan. currently at 7% scan with lots of blue and 1 stripe of green.

disks 0,1,2 are in the correct order however only disk 1 and 2 are showing data.

disk 0 is an image of the original drive, disk 1 is an image of the original drive, and disk 2 is the auto created parity for the missing disk.

disk 0 had alot of errors and the partitions disappeared after netgear tech support was testing my machine. disk 1 was possibly reformatted and disk 2's pcb is bad(which i am sending out for repair). in the meantime i am attempting recovery on the existing images.

Is the absence of data for disk 0 normal?

thanks in advance

[Tom]

Disk 0 has errors but an image is used. Did the image creation go well? How does disk 0 have errors, does that show up now in the scan or is that something that came up while creating the image?
A formatted disk is obviously not a very good thing.
Any chance of a screenshot?
It seems you have a bad situation, and it's made worse by things like formatting and disk errors, so in all this doesn't look good. Still, let the scan finish and see what happens.

[dtschoolit]

Before netgear tech support connected remotely to my machine, disk 0 had alot of SMART errors(i knew if was starting to fail) but was showing all partitions in disk management.

I should have made the image then, but i trusted their techs and went against my better judgement. Afterwards, the partitions of disk 0 were all gone.

I created the image using runtime's raid reconstructor which completed without any errors.

I am attaching a screenshot of the current progress.

[Tom]

So you don't know what the Netgear people did to the drive? It seems disk 0 (or the image) has no content, or no content that iRecover can use to reconstruct RAID data. Any chance you can find out what they did and why the disk's content seems to have disappeared after their work?

[dtschoolit]

i will contact their support and ask...

so why is disk 2, (which is the auto created parity for the missing disk) populate with a mirror of disk 1?

Is this typical for raid-5 recovery?

[Tom]

so why is disk 2, (which is the auto created parity for the missing disk) populate with a mirror of disk 1 ?

I should hope it isn't. The appearance of this may be caused by something that is not right on disk 0, I can't tell from this.

Is this typical for raid-5 recovery?

No.

[dtschoolit]

thank you for your replies.

I am waiting for a repaired pcb for disk 2(the missing disk) and will try again with this drive (instead of disk 0) once i receive it if this does not work.

Or should i attempt with all drives connected?

[Tom]

If all drives can be present and in good condition then that is obviously preferred. If the situation is different then take the 2 (out of 3) drives that have the best chance of giving you good results (so being in good health and having data on them).

[dtschoolit]

thank you

[Joep]

I attempting recovery (irecover pro) of a 3 disk raid 5 array ext md (netgear ready nas pro) with one disk missing.

I enabled md in the options before the scan. currently at 7% scan with lots of blue and 1 stripe of green.

After enabling the MD options the first thing to try is the 'data recovery for linux and windows' option (so not the 'RAID recovery' option).