Recover data from faulty Synology NAS

Issue

Synology DiskStation 415+ NAS failed. Blue power button LED keeps blinking. Status LED is off. All 4 disk orange LEDs steady on (there are only 2 HDDs installed). Removing all hard drives doesn't change anything. Replacing RAM doesn't change anything either. All this indicated motherboard failure. Owner asked to recover data from hard drives.

Resolution

  • Connect both hard drives to a PC.
  • Boot PC from a Linux Mint (18.3) Live CD.
  • Open Terminal and run:
    • sudo apt-get install mdadm
    • sudo┬ásudo apt-get install lvm2 (in my case it was already installed)
    • sudo mdadm -Asf && vgchange -ay
  • Wait few seconds and the RAID is mounted as a new volume.
  • Browser the volume and copy required folders to an external USB drive.

December 2017
Synology DS 415+
Linux Mint 18.3

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