NETGEAR is aware of a growing number of phone and online scams. To learn how to stay safe click here.
Forum Discussion
Solved
RN104 Raid-X disk 3 failed and disk 2 unknown. Please help
Hi All,
I'm new here but would greatly appreciate a solution to this mess.
I have a fully populated RN104 which has 4x ST4000VN000 drives. It was configured with RAID-X in 2015. The firmware is now 6.9.3 and the 12 TB storage is about 3/4 full. I use this for archiving (i.e. no other copies anywhere) and also backup of current laptop files (so these are not lost)
Last night, I noticed that some of it's shares and some folders in other shares were not readable. Checked status to see that Disk 2 was UNKNOWN and Disk 3 was FAILED. I rebooted the RN104 via the admin page to see if the system would at least tell me more about the UNKNOWN status. It now gives me completely different information and prompts me to remove inactive volumes Disks 1, 3 and 4. This makes no sense compared to what the previous statuses were.
The logs (attached) show Sun Jan 20 2019 Disk: Disk in channel 3 (Internal) changed state from ONLINE to FAILED and that Disk 2 had an increasing uncorrectable error count since at leat June 2018.
Unfortunately, the email alerts I should have been receiveing were not being allowed by the receivng SMTP server (I have now fixed that, but way too late.)
Can anyone throw some light on how I can recover the data files from array from this state?
Thanks and hoping.
Alec
Hi AlecSmith
Welcome to the Community!
Your NAS had multiple disk failure that is why your volume got inactive. Disk 3 failed and since Disk 2 had an increasing error count it might have failed during that time as well. It's unfortunate that we weren't able to replace the disk at the time of failure.
The best thing is to contact Support and purchase the Data Recovery service or if you plan on DIY, checking on ReCLAIMe might be a good idea. There are other applications used by the Community members that might be advised as well.
I hope you can still recover most of the Data on the NAS. If it's a backup storage then original data should still be safe.
Hope this helps!
Regards
3 Replies
Hi AlecSmith
Welcome to the Community!
Your NAS had multiple disk failure that is why your volume got inactive. Disk 3 failed and since Disk 2 had an increasing error count it might have failed during that time as well. It's unfortunate that we weren't able to replace the disk at the time of failure.
The best thing is to contact Support and purchase the Data Recovery service or if you plan on DIY, checking on ReCLAIMe might be a good idea. There are other applications used by the Community members that might be advised as well.
I hope you can still recover most of the Data on the NAS. If it's a backup storage then original data should still be safe.
Hope this helps!
Regards
Hi All,
Just a post-solution note.
I used ReclaiMe RAID recovery and ReclaiMe data recovery in sequence to recover 4.5 TB of files. This would NOT normally have worked the case of two failed disks. However, one of the disks (they were ST4000NV000 units) was operating intermittently on a USB connection so actually only one disk was fully unreadable. It was necessary to repeatedly close a ReclaiMe dialogue box to continue with the recovery. I automated this using a tool called ClickOff. (It would have been nice if ReclaiMe had offered a retry next time option.) If I had not done this, the process would have taken much more that the eight days it did. I also disabled Windows Update to avoid being restarted by Microsoft.
NETGEAR Academy
Boost your skills with the Netgear Academy - Get trained, certified and stay ahead with the latest Netgear technology!
Join Us!
