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Forum Discussion
Recover data from faulty RND4000v2 (ReadyNAS NV+ v2)
Hi, luckely it has not happend yet, however, as the RND4000v2 (ReadyNAS NV+ v2) I have is getting older, I need to have some mechanism inplace to recover the 4x4TB Disks in raid in case of a total fa...
xbmcgotham wrote:
Hi, luckely it has not happend yet, however, as the RND4000v2 (ReadyNAS NV+ v2) I have is getting older, I need to have some mechanism inplace to recover the 4x4TB Disks in raid in case of a total failure of the RND4000v2 hardware.
The only way to really keep your data safe is to back it up to a different device - ideally more than one. USB drives are a cost effective way; though I prefer the convenience of NAS->NAS backups.
Depending on data recovery is extremely risky, and there lots of people here who have discovered that the hard way. Disks can and do fail in rapid succession, and there are cases where power surges damage all the disks and the chassis. Unexpected shutdown (power loss, hardware failure, or software crashing) can give you an out of sync array. Plus there's theft, fire, water damage, etc... and the possibility of human error.
However, if data recovery were needed for some reason, there are some options. Netgear offers a service: https://kb.netgear.com/69/ReadyNAS-Data-Recovery-Diagnostics-Scope-of-Service and there are some other ones out there. You can also use RAID recovery software - for instance R-Studio ( https://www.r-studio.com/ ). It is generally advisable to clone the disks (doing sector by sector copies to known good ones) and then attempt recovery with the clones. One reason is that you don't want the disks to fail completely during recovery. Another is that you don't want to accidentally do more damage in your recovery attempts.
I haven't seen a step-by-step guide - and since there are a lot of scenarios here, I don't think it'd be easy to create a comprehensive one.
Thanks for the quick response!
I agree backup if best. The problem is size. I have not the finances to get an additional backup system in place with 16TB of disks. My interest is in failure of the Readynas itself. Disks failures have happend a few times so far, but easily fixed by replacing the faulty disk. In case of just preparing for a readynas failure, would you be able to go into some more details on the best solution?
What software and hardware (cables/system) do I need to have ready?
And does readynas not have a 4-bay readynas that is still for sale that can be used to swap the disks into and use this device instead?
I am handy enough with computers, however need to be sure that I use a succefull tested approach. :-)
Thanks again!!
xbmcgotham wrote:
What software and hardware (cables/system) do I need to have ready?
If you want to recover in a PC, you probably won't have enough SATA ports. You can get a USB or SATA enclosure that solve this problem. You don't need one that has RAID hardware.
On the software side we've already talked about cloning software (e.g. clonezilla) and RAID recover software (e.g. R-Studio ). If you prefer to work in linux, you'd want a Live boot disk for Linux (or use a PC with linux installed).
xbmcgotham wrote:
And does readynas not have a 4-bay readynas that is still for sale that can be used to swap the disks into and use this device instead?They don't. Newer ReadyNAS use different disk partitioning and a different file system. While direct migration to a new OS-6 NAS isn't possible, support can help you mount your current disks temporarily so you can offload data. They likely will charge for that. https://kb.netgear.com/29876/ReadyNAS-Migrating-disks-from-RAIDiator-4-1-or-RAIDiator-5-3-to-ReadyNAS-OS-6
You can try to purchase a used NV+ v2, but be careful that you don't accidently end up with a used NV+ v1. Many sellers "borrow" photos from shopping sites, so photos don't always help. On top of that the labeling on the v1 is confusing.
xbmcgotham wrote:
I agree backup if best. The problem is size. I have not the finances to get an additional backup system in place with 16TB of disks.
I get that, but I suggest that you consider starting smaller. Some of your data is more precious than others - for instance personal documents and photos aren't replacable. Your media library might not be 100% replacable (and would be a pain to re-create), but probably isn't as important. So you can back up some of your data now, and increase the backup capacity over time.
If you are buying ahead, an 8 TB Easystore is similar in cost to a 4-5 bay enclosure. You'd be better off with the EasyStore and backing up half your data than you'd be getting an enclosure for use later on.
I'm not quite following your logic. You say you can't afford backup. But if you have to do a recovery, you'll need a place to store the recovered data. If you an afford that, you can afford backup -- it's the same stuff, less the cost of the recovery. And, as StephenB says, you can start creating backup incrementally. If you need recovery, you'll be shelling it out at one time.
Old IT saying: If you only have one copy of something, you must not think it's important.
That said, you could start looking for a used 4 or more bay legacy Intel-based system on eBay (NVX, Pro, Ultra, 1500, 2100, 3100, 3200, 4200, 4200V2). It'll be used, so may not last long, but you can just move your drives to it. If it's another NVX, it should be cheaper than the rest, both because it's older and because it can't be upgraded to OS6. Many NAS on eBay are listed at far too high a price, but you have the time now to look for one that's appropriately priced (or wait for somebody to wake up and lower theirs).
Note that the numbered ones above are all rack-mount, and quite loud. Unless you have a place to put it to isolate the noise (and a closet isn't a place to put it), you probably won't want to use it for long. The 3200 and 4200 (but not 4200V2) can't handle drives larger than 2TB in slots 5-12, but slots 1-4 will work with any drives that will work in an NVX.
Sandshark wrote:
but you can just move your drives to it.
Just want to point out that you can't directly migrate your drives from a v2 platform to a legacy x86 platform.
You can install new disks, and do NAS->NAS backup. The x86 platforms are faster, so I'd use the x86 as the main NAS and re-purpose the v2 as the backup.
Thanks again for the detailed response!
You mentioned:
"While direct migration to a new OS-6 NAS isn't possible, support can help you mount your current disks temporarily so you can offload data"
1. Did you mean I can buy any readynas diskless 4-buy OS-6 NAS and insert the 4 disks in there with support of Readynas service?
2. How would I unload the data than if I can only temp use the OS-6 NAS?
"You can try to purchase a used NV+ v2"
3. In case I can still find the same NV+ v2, is it just as easy as inserting the old 4x4TB disks and switch on the device and it would work again as the broken NV+ v2? Without the risk of the new NV+ v2 formating all the old disks once inserted? What is the correct procedure to prevent any loss of old data this way?
Thanks again.
xbmcgotham wrote:
1. Did you mean I can buy any readynas diskless 4-buy OS-6 NAS and insert the 4 disks in there with support of Readynas service?
Yes. Details are here: https://kb.netgear.com/29876/ReadyNAS-Migrating-disks-from-RAIDiator-4-1-or-RAIDiator-5-3-to-ReadyNAS-OS-6
I don't know the cost (and of course it might change). Note the caveat - if the array is damaged as a result of the failure you'd need data recovery from Netgear. https://kb.netgear.com/69/ReadyNAS-Data-Recovery-Diagnostics-Scope-of-Service The starting price of that service is higher than the 8 TB Easystore I mentioned above - and recovery isn't guaranteed.
xbmcgotham wrote:
2. How would I unload the data than if I can only temp use the OS-6 NAS?
You'd need USB drives to store the data onto.
xbmcgotham wrote:
3. In case I can still find the same NV+ v2, is it just as easy as inserting the old 4x4TB disks and switch on the device and it would work again as the broken NV+ v2?
Pretty much (assuming the used NAS actually works - sometimes it doesn't).
You'd
- Do a factory install with a test disk (not part of your array)
- Upgrade the firmware to match your current NAS
- Power down, and install the actual disks (preserve slot order).
- Power up.
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