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Forum Discussion
ReadyNAS 104 running 6.6.1 amazon deleting files
I just read a post here which claims this problem was discovered and then solved in 6.6.1. It is not. I have been syncing to amazon for a few months, with a fear that this would happen, and ...
I have been trying to watch the type of files that are being deleted. I have been doing a lot fo video creation lately, and I am rendering various assets as I go. The render jobs take some time to complete and the resulting files grow as they render. It appears that these files are being uploaded to amazon at various stages of the render as it grows. It also appears that as amazon gets a new larger version it deletes the previous version. My guess is that somwhere along the way it loses track of the changes and deletes the last known version that landed in amazon, which then causes the last version on the local machine to disappear.
This is only a hypothesis and still needs a remedy.
Any writes done to the volume whether automatically (e.g. snapshot creation/deletion, scheduled volume maintenance, the system cleaning up after deletion etc.) or by you manually reduce the chances of recovering deleted data. So as mentioned it is important to get the volume mounted read only ASAP if you want to attempt to recover data.
Amazon stores deleted versions for 30 days. I have just been recovering the files I need from their interface. The point is that this should not be happening in the first place. the readynas should not be moving files that are active.
Redwolf wrote:
The point is that this should not be happening in the first place. the readynas should not be moving files that are active.
When we see reports of data loss here, then recovering the missing files of course becomes our priority. If you had said "I am getting the files back" or something similar, we wouldn't have worried about read-only booting.
As far as the root cause goes, there are fixes to Amazon cloud in 6.7.1 (and nothing in the 6.6.1 release notes). More than likely the original fix simply didn't make it into 6.6.1. In any event, normally Netgear focusses their bug-fixing on the current release.
But more fundamentally, two-way sync isn't suitable for backup - and unfortunately that's all that ReadyNAS has at the moment.
Bi-directional sync is great for having access to your data on all your devices. As StephenB mentioned it isn't a backup.
Feature Requests should be posted in the Idea Exchange.
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