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Showing results for tags 'crashed volume'.
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Hi I am using synology hybrid RAID with 5 drives. 4 are working fine, but 1 is failing. My volume is crashed. I know that SHR has 1 disk tolerance so it should recover if only 1 drive failed but i cannot recover it. Please help me.
So I wanted to post this here as I have spent 3 days trying to fix my volume. I am running xpenology on a JBOD nas with 11 drives. DS3615xs DSM 5.2-5644 So back a few months ago I had a drive go bad and the volume went into degraded mode, I failed to replace the bad drive at the time because the volume still worked. A few days ago I had a power outage and the nas came back up as crashed. I searched many google pages on what to do to fix it and nothing worked. The bad drive was not recoverable at all. I am no linux guru but I had similar issues before on this nas with other drives so I tried to focus on mdadm commands. Problem was that I could not copy any data over from the old drive. I found a post here https://forum.synology.com/enu/viewtopic.php?f=39&t=102148#p387357 that talked about finding the last known configs of the md raids. I was able to determine that the bad drive was /dev/sdk After trying fdisk, and gparted and realizing I could not use gdisk since it is not native in xpenology and my drive was 4tb and gpt I plugged the drive into a usb hard drive bay in a seperate linux machine. I was able to use another 4tb that was working and copy the partition tables almost identically using gdisk. Don't try to do it on windows, I did not find a worthy tool to partition it correctly. After validating my partition numbers, start-end size and file system type FD00 I stuck the drive back in my nas. I was able to do mdadm --manage /dev/md3 --add /dev/sdk6 and as soon as they showed under cat /proc/mdstat I see the raids rebuilding. I have 22tb of space and the bad drive was lost on md2, md3 and md5 so it will take a while. I am hoping my volume comes back up after they are done.