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Forum Discussion
Limitations of RN51600
Hi all, Just to start I like to say that I have a four bay NV+ and a Ultra 6. I'm so happy with the units I am looking to get another unit, I'm looking getting the RN51600 this time but, before I ...
StephenB wrote: Thanks for sharing. Hopefully Netgear will include them in the HCL at some point.
FYI, my pro-6 also shows some temperature variation by slot. So I think that is normal.
I agree. Full airflow is possible through the mesh around the sides, top and bottom of the drive bay stack. But there is a lot less space between the drive bays, as can be seen on the image below. So it's only natural that the top and bottom disk are cooled a little bit more that the ones in the middle.
After running 24/7 for a couple of years now, I experienced my first disk problem with a WDC WD4000FYYZ-01ULB0 4TB in slot 3 of RN516. The logs started showing this message a couple of weeks ago:
Detected increasing reallocated sector count: [1234] on disk 3 (Internal) [WDC WD4000FYYZ-01UL1B0, WD-WCC130771614] 34 times in the past 30 days. This condition often indicates an impending failure. Please be prepared to replace this disk to maintain data redundancy.
So I ordered a replacement disk (and another spare disk) of exactly the same make and model: WDC WD4000FYYZ-01ULB0 4TB. Assuming that hot swap was possible and the disk would automatically be rebuild, I took the new disk out of the packaging and immediatly swapped the faulty disk without stopping the RN516. When removing the faulty disk, the volume was indicated as "degraded". When insering the new disk, resync started, but lastet less than 30 seconds, after which the volume showed up as "Rebuild, but still degraded" and depicted with red color in volume display. After reboot, all disks in the volume were marked red and I wasn't able to get it working again. The only option left was to do a Factory reset. Daily backups have been taken from the data, so it should be OK, allthough the work on setting up the apps and web server will be cumbersome. After factory reset and creating the volume again, all disks show up blue with green leds in the volume depiction.
Is there anything I could have done differently, to have the disk swap run smoothly and have the volume automatically rebuild?
dsnpevl wrote:
Is there anything I could have done differently, to have the disk swap run smoothly and have the volume automatically rebuild?
Your process should have worked. Did you download the logs before the reset? Netgear might want to take a look.
No, didn't take the logs before proceeding to the factory settings. Should have thought about that.
The other thing I would recommend seeing you have just done a factory default would be to disable X-RAID, destroy the default volume and create a new one using RAID-6, then re-enable X-RAID. With high capacity disks and four or more (4 disks is the minimum for RAID-6), RAID-6 is a much better option than RAID-5.
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