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Forum Discussion
Ready NAS 102 in accessible (corrupt root)
Netgear Community: I have been using a ReadyNAS DUO V2 device with a single WDC WD20EFRX 2TB HDD without issue. At this time, the device is not accessible, does not register as being on my ho...
Hi StephenB.
Thanks for your post.
Based on the back panel layout and front cover featuring the explicit label "ReadyNAS DUO v2", I'm reasonably confident I >do< have the V2 product.
I downloaded an evaluation copy of R-Linux (R-Tools?) but it wasn't able to see the NAS device on the network. Do I need to place the HDD in a USB enclosure, attach that directly to the PC with this product?
My question about USB recovery *without* the HDD installed is to perserve the contents/state of the HDD.
All paths seem to point to Netgear Support to have them weigh in as well.
Thanks again.
wjastrow wrote:
I downloaded an evaluation copy of R-Linux (R-Tools?) but it wasn't able to see the NAS device on the network. Do I need to place the HDD in a USB enclosure, attach that directly to the PC with this product?
Yes, and that'd be true with all similar products - the NAS isn't booting after all.
wjastrow wrote:
My question about USB recovery *without* the HDD installed is to perserve the contents/state of the HDD.
Understood. But the problem is with the OS partition on the HDD, and USB recovery won't help that.
USB Boot Recovery requires booting off a compatible USB key. It wipes the internal flash and puts a clean copy of the firmware on it. The disks neither need to be installed to run USB Boot Recovery, nor do they need to be removed.
USB Boot Recovery will only help if the firmware on the flash is corrupt. As StephenB mentioned it's not going to help with this problem.Thanks for your insightful, helpful contributions.
As I type, the HDD in question is being scanned by "linux-reader" from DiskInternals. I was able to "install" the HDD from the ReadyNAS into a (powered) USB enclosure, then connect that to a Windows 10 PC.
It was a small relief to see that this facility quickly identified the WDC HDD, along with its "partitions". It also advised that the RAID was "damaged" but "recovery was possible". That led to downloading another component (which appears to require a license) called "RAID recovery". At the moment, the HDD is being scanned, finding folders and files. I expect this process to take hours (possibly days?).
All this *suggests* that the content is accessible, that the disk is not entirely damaged.
This leads me to ask whether a true RAID (2 physical devices, 1 a mirror of the other) would have been impacted by whatever phenomenon led to the "corrupt root" condition. Plainly, is the RAID protection restricted to the "content only" portion of the HDD?
I have no issue with this Netgear product which has worked (and seems to continue to work) long after its purchase (and warranty expiration).
Presuming I am able to recover the contents from this "corrupt" device, could it safely be reformatted? I appreciate that there's really no way to be sure; that's more asking for an opinion. I'll have to purchase new storage devices anyway, and since there's no apparent "upgrade path", probably a new NAS device. Is there a logical upgrade from the ReadyNAS DUO v2?
Thanks again.
wjastrow wrote:
Presuming I am able to recover the contents from this "corrupt" device, could it safely be reformatted?
I'd test the disk(s) in a PC first - lifeguard for Western Digital and seatools for Seagate. If they pass, then there's no reason you can't use them again.
wjastrow wrote:
Is there a logical upgrade from the ReadyNAS DUO v2?
The RN102 is the corresponding product in the current lineup. But I'd also price out the RN202 and the RN212 - both are a nice step up in performance from the RN102.
wjastrow wrote:
This leads me to ask whether a true RAID (2 physical devices, 1 a mirror of the other) would have been impacted by whatever phenomenon led to the "corrupt root" condition. Plainly, is the RAID protection restricted to the "content only" portion of the HDD?
The OS partition is also mirrored, and it uses what you are calling "true raid".
Mirroring helps protect against disk failures, but any disk writes are mirrored too, so it doesn't protect against everything. One scenario I've seen several times here (and experienced once myself) is seeing "corrupt root" after an unexpected power cut.
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