RN104 Data degraded on brand new disks

Question

Okay so I have a RN104 4 disk readynas. I have had problems with this one before with killing my disks (was told my disks were not supported so reason for failure), so now i finally bought 4 new 4T WD red drives and i finally found time to start the process of installing and start moving all data again.

I installed the drives and went with the RAID 5 option (but on the volume overview it says RAID 5 but to the right X-RAID is green)

After some 100 hours the drives were resynced and i started setting up backupjobs so i could move all data from my pc where i have had stored all my rescued data. Now after some 48 hours of backupjobs i start getting messeages on my mail..

"Detected increasing reallocated sector count: [515] on disk 4 (Internal) [WDC WD40EFRX-68WT0N0 WD-WCC4E2ZTJ07A] 47 times in the past 30 days. This condition often indicates an impending failure. Be prepared to replace this disk to maintain data redundancy."

And

"Detected increasing ATA error count: [28] on disk 4 (Internal) [WDC WD40EFRX-68WT0N0, WD-WCC4E2ZTJ07A] 21 times in the past 30 days. This condition often indicates an impending failure. Be prepared to replace this disk to maintain data redundancy."

Then a while ago i get

"Resyncing started for Volume data."

and a minute later

"Volume data health changed from Redundant to Degraded."

"The resync operation finished on volume data. However, the volume is still degraded."

So now i get back home and i see that under Performance that now i'm missing disk 4.

All my drives have 96 Power On Hours.

Under volumes my disk 4 is now missing

So i have cancelled all my backup jobs.

So, i am really feeling that this readynas must be a disk killer.

Some of the old drives that was in my NV+ v2 and also in this RN104 i took out as they were not working in the NAS anymore. They have worked for more than 2 years without problems in my other PCs and are still running.

And yes, lastest OS 6 version is installed.

So what to do next? is yet again disks bad or? these drives are supported by Netgear so that excuse will not work. Is the drive already failing? funny thing is previously "failed" drives in the nas have been working in my PCs .

How come the readynas brings on so many errors? is Readynas just a big pile of ****? look for other brands?

So display flashing "data Degraded" so do i need to shut it down and pull the disk?

check the disk with what? What will it tell me? Anyway, i obviously cant put it back in the NAS so, i need to replace it? that means i need to rely on that it is faulty for real and not just in the readynas world.

omicron_persei8 · Answer

Reallocated sectors are pure disk errors. A NAS or PC cannot cause that.
ATA errors are a little different. But if you get Reallocated Sectors, it means the drive is bad, and the NAS had nothing to do with it.
Also running HDDs in a RAID is more stressful that just using the HDD in a PC (especially during resync). You can download a disk testing tool from WD's site and the HDD with that.

mdgm-ntgr · Answer

I agree. It's definitely a bad disk.

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As omicron_persei8 also mentioned you can test the disk using WD Data LifeGuard Diagnostics if you wish.

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The WD40EFRX is designed for use in systems with up to 8 disks and is a good drive choice.

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However, disks&nbsp;can and do fail at any time in systems &nbsp;from any brand. It's one of the reasons why backups are important.

frankiev2 · Answer

Thanks for your input. I took out the disk and ran it with WD own diagnostic software and it also gave me reallocated sector count errors. Now this disk is brand new with warrenty so i will not be messing with it but return it to get it replaced.

But regarding the fact if Netgear hardware is actually to blame? I have 3 friends that all have Synology NAS, one of them is 7 years old and runs with old 500 gb disks AND they were all used when mounted in the NAS at the time and of various brands. Never had any issues with his. Another friend have 2 NAS of the same brand, one will 4 year old 2TB drives (4pcs) and one with various size drives (4 pcs) running on the 5th year, one problem only and that was a 250GB drive that was like 10 years old when it died. The third guy has 3 2TB drives in his running for 4 years now without problems.

Myself opted for Readynas, can't even remember why any more, maybe cheaper and during 4 (soon 5) years i have now replaced some 9 disks on two NAS (NV+ v2 and RN104). Unlucky can take care of some of the drives.. but i still feel that hardware has to be a factor here. Even with recommended drives.. And to top it... this morning i look at the logs for my NV+ V2 and now a 3TB WD Red, less than one year old is starting to show errors, that means soon i will have to replace disk no 10.

So with all this in mind, i would say that hardware does play a role or new disks are just so bad these days.. I have a 1.5TB 8 years old disk still running in the NV+ V2 and that one have had no problems and it's the only reason its still in that NAS..

Anyway, thanks for your input. Lets see what happens with i get a replacement disk.

omicron_persei8 · Answer

https://en.wikipedia.org/wiki/S.M.A.R.T.https://kb.acronis.com/content/9105As previously said, this is a pure HDD error, they're not generated by the NAS.If your HDDs are too hot due to poor cooling of the chassis, or if the HDDs are always vibrating because of poor mounting in the chassis, NAS or PC, power supply issues, etc., it may indirectly cause some HDD problems. But unless you have obvious evidence of this about the chassis the HDDs are in and that pretty much ALL the HDDs you have always have the same behavior, then you can rule out the chassis from having anything to do with it.

StephenB · Answer

omicron_persei8 wrote:
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As previously said, this is a pure HDD error, they're not generated by the NAS.
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Correct. &nbsp;
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FWIW, I started deploying WDC Red drives in my various ReadyNAS in Nov 2012. &nbsp;I'm running 11 right now, I've seen only 1 Red drive failure over the years. &nbsp;These are in a ReadyNAS Pro, a Duo v1, an RN102 and an RN202.
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You might try a different supplier (perhaps there is some damage in shipping/handling). &nbsp;I'd also take a look at disk temps, and check to see if the chassis is placed somewhere where experiences a lot of vibration.
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RN104 Data degraded on brand new disks

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