karlpox Posted May 4, 2016 #1 Posted May 4, 2016 Hi, Good day! My volume went into degraded mode with 6x3TBs. Reason was one of the drive didnt boot probably I guess after a power outage. The drive is healthy though after another reboot, but the volume already removed it and entered degraded mode. So I re-added the drive and rebuilt the raid. Now one of the drives (not the one being added) crashes somewhere after 12hours due to bad sectors. I already remapped the bad sectors twice but still I cant finish rebuilding the raid. Any idea how to fix this? Or is my raid dead already? Karl
brantje Posted May 4, 2016 #2 Posted May 4, 2016 Attach both disks to a PC and run a SMART check. If one disk is healty then it may be possible to reassemble the raid using Ubuntu and mdadm (The raid software Synology uses). If both disks are 'dead' then i'm afraid the data went to bit heaven. Posted via Xpenology.us
shrabok Posted May 4, 2016 #3 Posted May 4, 2016 You might want to read through this post for some recovery options. viewtopic.php?f=2&t=12528 With a recovery usb you could try performing an FSCK to see if there are some correctable errors or check the state of the disks. What raid are you using, do you have dual parity (like SHR-2 or Raid 6) or is it a single disk parity? It's common when a raid performs a rebuilt it will cause another disk failure due to all the replication the occurs. If you had dual parity you can recover in this case, with single parity it might not go so well. Let me know how things go or if you need some additional guidance.
karlpox Posted May 5, 2016 Author #4 Posted May 5, 2016 http://i.imgur.com/CiEEuXf.png Disk 5 is the original drive that was removed by Synology after a power outage. Disk 3 is the drive crashing if I try to rebuild. Is it possible to clone Disk 3 to a new drive and replaced Disk 3 with the new cloned drive, then rebuild with Disk 5 again? Karl
shrabok Posted May 5, 2016 #5 Posted May 5, 2016 Can you provide your disk group configurations and raid configurations. The SMART abnormal notice means the disk is likely bad and has problems The Crashed disk I am unsure if thats data corruption or disk problems and smart seems ok.
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