Q:

How to recover data from crashed nas?

Hi – I am in a bit of a sticky situation and am hoping someone can help me out. I have a 4 bay DS418Play NAS with all 4 bays in use. I had set it up as SHR1 but after one of my drives crashed, I replaced with a new one. However soon after that, the new drive crashed as well. I figured my NAS is falling apart and i need to buy a new one, so i shut the NAS down while waiting to buy a new NAS. 2 days later, i needed access to a file urgently on my NAS so i turned it on and downloaded my file, but my NAS suddenly restarted and after restart I had another drive showing up as crashed. So now I have 2 drives crashed out of 4… and after the restart when I tried to access my data in the NAS, i could not see any data in the NAS 🙁. But i feel certain that the data is not lost in the drives and it is the NAS which has caused the drives to crash. But i am not sure how to recover my data safely. I have not turned on my NAS since that day yet. How can i recover my data or rebuild the NAS (or transfer to  a new NAS) with minimal risk of loss of data? I would like to avoid giving my drives to someone else (e.g. a professional) if possible for privacy reasons.

  • This topic was modified 1 day, 5 hours ago by bebir.
NAS data recovery

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With a 4-bay DS418play running SHR1, two reported drive failures will take the volume offline, but that does not automatically mean the data is gone. Leave the NAS powered off and do not attempt any rebuild, repair, or reinitialization, as that can overwrite RAID metadata and reduce recovery chances. Remove the drives and label them in their original bay order. Connect all four drives to a desktop PC and do not allow the operating system to initialize or format them. Check SMART health to see whether the drives are physically failed or just marked as crashed due to RAID or system corruption. If the disks are readable, use RAID recovery software to virtually rebuild the SHR (RAID5-like) array and copy the data to a separate storage device. Do not try to repair the array inside the original NAS until your data has been copied elsewhere. In many cases, this type of failure is caused by metadata corruption or a NAS hardware issue rather than two completely dead drives, and recovery is still possible if handled carefully.

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