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Forum Discussion
Resync after power failure
I lost power to my ReadyNas NV due to Hurricane Sandy but repowered it when the power came back on. RAIDer version 4.1.10 is reporting that Resync is 8% complete and it will take 4 hours and 20 minutes to complete. It has been a few days but RAIDer is still reporting the same Rysync is 8% complete. All the number remain the same, it is as if nothing changed. I have 4 drives total occupying channels 1-4. I noticed RAIDer is reporting channels 3 and 4 have ATA errors. All the drives have solid green lights on the unit and in RAIDer. My question is this, do I have to be more patient to wait longer for the Resync to complete or do I have some other problem that require action on my part to move it along like replace a drive. I have only one volume using RAID level X.
Any insight or help on the matter is greatly appreciated. Thanks.
Any insight or help on the matter is greatly appreciated. Thanks.
12 Replies
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- What brand and model disks are installed? What's the size of the ATA error counts on disks 3 and 4?
- Channel 1: Seagate ST3400620AS (400 GB)
Channel 2: Seagate ST3400620AS (400 GB)
Channel 3: Western Digital WD5000AAKS-00UU3A0 (500 GB) ATA Errors
Channel 4: Western Digital WD5000AAKS-00UU3A0 (500 GB) ATA Errors
RAIDar does not tell me how many ATA errors there are. How do I found out? I can't access the setup page due to the Resync operation. - Nevermind, I missed the numbers next to the ATA Errors. I must be blind. Each of the Western Digital drive have 18 errors each.
- Those errors could have been caused by briefly using those disks with old firmware that they aren't compatible with.
Looks like you've had at least some of those disks a long time. So it's quite likely that one of them is failing.
You might wish to try powering down the NAS, removing the disks (label order), hook them up to your PC and check the SeaGate disks using SeaTools and check the WD disks using WD Lifeguard Diagnostics. - The Western Digital harddrives are fairly new. Those are the one that have the ATA errors. The Seagates are the old ones.
Where does the firmware come into play? There NAS was working before the power outage.
Does my situation mean all the data in my RAID volume is lost? That would be very unfortunate. - Your data may not be lost.
By testing the disks outside the NAS, you may be able to identify a faulty disk which can then replace. - Say I test the faulty Western Digital disks outside of the NAS and the WD Lifeguard Diagnostics say they are unrecoverable, how do I recover my data? Doesn't the ReadyNAS NV only can handle one disk failure but not two? Remember I have two disk that have 18 ATA errors each. I am hopeing to recover my data but fearing the worst with my limited understanding of the situation. Am I missing something here?
Channel 1: Seagate ST3400620AS (400 GB)
Channel 2: Seagate ST3400620AS (400 GB)
Channel 3: Western Digital WD5000AAKS-00UU3A0 (500 GB) ATA Errors
Channel 4: Western Digital WD5000AAKS-00UU3A0 (500 GB) ATA Errors
If situation is better in that only one of Wester Digitals is fauly, once I replace the faulty disk with a new one, will I be able to recover? - Yes you are correct, you are hoping that only one disk has gone; I would be.
Do you have a backup?
The alternative approach is to try booting with a single disk removed at a time. Just make sure you label the disks for position, and don't remove or add without first powering down the Nas.
If you remove the faulty disk, the unit should boot.
I think the first step is to sort out what is broken.ieeevhdl wrote: Say I test the faulty Western Digital disks outside of the NAS and the WD Lifeguard Diagnostics say they are unrecoverable, how do I recover my data? Doesn't the ReadyNAS NV only can handle one disk failure but not two? Remember I have two disk that have 18 ATA errors each. I am hopeing to recover my data but fearing the worst with my limited understanding of the situation. Am I missing something here?
If both disks are completely unreadable, then you have lost data. However, we don't know that is the case at the moment. There are other scenarios which would allow full recovery of the data.- I will try to remove a single disk at a time when I get back home and hope for the best.
Are you aware of any pitfalls if I remove one of the faulty disk to connect to a PC and try to recover it using WD Lifeguard Diagnotics? I am afraid of the WD tools attempting to recover the disk but do succeed or not succeed and making it worst for ReadyNAS to recognize the volume.
BTW, I subscribe to ReadyNAS vault. I have regular offsite backup before this mess happened. I guess that is my saving grace. How easy is it to recover from ReadyNAS vault?
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