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NAS RAID5 recovery

Posted: Tue Sep 10, 2013 12:08 am
by nasz
I have a Thecus n5500 - 5x2TB RAID 5 NAS. Over the weekend I rebooted the unit and it lost the RAID. So I'm trying to get the data back!

To do this I'm trying a demo version of R-Studio - but when I connect to the unit over the network to deploy the agent I get the following error:

Connecting to 192.168.1.202 failed

I don't have enough spare drives to clone the drives in the unit. Nor do I have enough drive space on my Windows 7 PC to create images. I could mount each drive physically in my Windows PC, but not sure how that will help me access my data (over 30 years of photos and home videos)

Any ideas on how I can see the drives?

Re: NAS RAID5 recovery

Posted: Tue Sep 10, 2013 1:19 am
by nasz
Another question:

Using the R-Studio demo version, I did a Scan of the drive and can see some of my data - which I assume I could click on 'recover' to get back.

Can I recover my files directly from this drive, or do I need to create a virtual RAID? I also have a lot of video files of 8-24Gb to recover.

Re: NAS RAID5 recovery

Posted: Thu Sep 12, 2013 4:29 am
by Alt
Can you provide me with a screenshot of the Drives panel in R-Studio with the NAS drive?

Re: NAS RAID5 recovery

Posted: Thu Sep 12, 2013 6:51 am
by nasz
URL to image (file was rather large)

http://www.lunicus.org/download/temp/Image1.png

I started cloning the 5 drives, though drive 2 kept coming up with 'Media was removed' error. Just in process of cloning drive 3.

Thanks for any help

Re: NAS RAID5 recovery

Posted: Sun Sep 15, 2013 1:24 am
by nasz
Cloned 4 of the 5 drives - Drive 2 kept coming up with 'media was removed'.

Now I am attempting to find the MBR on each drive using the details from http://www.r-tt.com/Articles/Finding_RA ... ndex.shtml. Am using the hex address shown on the website, hopefully this is relevant? Must admit, I feel like I'm walking around in the dark. Very slow progress - but at least I'm moving forward.

Re: NAS RAID5 recovery

Posted: Mon Sep 16, 2013 10:36 am
by Alt
I think that the device has another partition scheme: GUID Partition Table (GPT), as the resulting volume exceeds the 2TB limit for MBR.

Re: NAS RAID5 recovery

Posted: Mon Sep 23, 2013 6:45 pm
by Corsari
@ nasz: have you solved the issue?

Cor

Re: NAS RAID5 recovery

Posted: Wed Sep 25, 2013 1:21 am
by nasz
Alas no - still attempting recovery.

Re: NAS RAID5 recovery

Posted: Wed Sep 25, 2013 4:40 am
by Alt
Try our new version of R-Studio, it can find RAID parameters automatically. At least, the RAID offset.

Re: NAS RAID5 recovery

Posted: Thu Sep 26, 2013 5:25 am
by nasz
Thanks downloaded. Quick question, I imaged the 5x 2TB drives using R-Studio compressed image. Though someone at work tells me that the compressed image will not work. The only problem is I don't have 10Tb free to do a byte-to-byte image. So will I be able to recover from compressed images?