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Forum Discussion
The resync operation finished on volume data. However, the volume is still degraded.
Hello,
- my RN10400 (latest FW6.6.1) contains 2x WD30EZRX in RAID1 and serves as my backup medium
- Every morning I replace the second WD30EZRX (which I take with me at home) with a 3rd WD30EZRX, synchronising starts and ends somewhere during the following evening
- so HDD1 never leaves the NAS, HDD2 and HDD3 are used every 2nd day as the second disk of the RAID1 array
This has worked very fine for several years but since appr. 2 weeks now I receive the message "The resync operation finished on volume data. However, the volume is still degraded" and this happens almost every time after the resyncing has ended sooner then normal and whether it is with HDD2 or HDD3.
Does this mean that I have to replace HDD1?
I can't find any indication in the LOGS that either HDD is faulty.
The HDD's in the VOLUME overview have both a green LED indicator
Thanks in advance for your suggestions.
Guido
7 Replies
So, in the past you were forcing a resynch on your RAID1 every morning by exchanging the disk in the second slot against a spare disk?
May I ask, for how many days/weeks/months/years you conducted this kind of backup procedure?
When the resync happens everything from the disk in the first slot is copied to your second disk and beyond that to my understanding each and every sector on both disks is also touched for consistency checking.
With your approach conducted for a long time it could very well be, that the first disk has just been weared off. Your second and third disk might become bad after twice the time the first one survived so far.
What ever you are going to do, just let me recommend to replace your current backup approach by something, which is not stressing your disks that much.
If you like you can read about MTBF on Wikipedia here
Swapping disks like you're doing is asking for trouble.
You can view some SMART stats for your disks in the GUI with history of key changes in smart_history.log in the logs.
Hi,
thank you also for your reply, the smart_history.log does not tell me much but I have another question, is there a way to recover the data form 1 of those disks with a WINDOWS tool?
Thanks!
Hi Roland,
thanks for your answer, i'm using this procedure for about 3 years now, without any problem.
I agree that this method is very stressing for the HDD's, maybe I should have used WD RED HDD's from the beginning.
I'll look into another approach, thanks
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