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Forum Discussion
ReadyNAS 516 Best Practice
Two questions: First, I'm about to replace a disk (smaller disk with a bigger one). Is it best to shut down the box (to take out a 4TB drive and replace it with an 8TB) or can you simply do a hot sw...
I want to thank you for all the time and energy you've put into handholding me on this.
What's confusing is that the four disks that are there are in the exact places they were when the sync ended. The only thing that has changed is the 4TB drive I put in Slot 5 and it showed black. Now that drive is out and the four drives are all showing red. Thye should have the volume data on them, but the system tells me I need to create a new volume because none exists.
Blues11 wrote:What's confusing is that the four disks that are there are in the exact places they were when the sync ended.
You started with 5 disks, with protection against a single drive failure. If two or more disks fail, then all the data is lost.
You replaced one disk, and when you did that you lost that protection until the resync completed. But the resync didn't complete, because a disk failed.
Going back to the original disks sometimes works, but not always. For example, it will fail if anything was written to the NAS (or deleted) during the resync. That would include automatic deletions and writes (for example snapshots being pruned, or files being defragged). Those changes result in the 3 original disks becoming out-of-sync with the disk you removed.
Data could still potentially be recovered, but that would require recovery software (or a service).
Another option is that you could attempt to clone the disk that failed to another disk. That might work if it isn't too damaged. But the more you try to do on your own, the more difficult (and problematic) data recovery becomes.
Thanks for the user manual. I did a Boot in read-only, but no change. The system now has two messages about removing inactive volumes, one for disks 2 and 6 and the other for disks 2, 3, 4, and 6. Not having the resources to dig deeper into the failure and/or clone individual drives, I think I simply must resign myself to doing a reset and creating a new volume. When the new (replacement) 8TB drive arrives I think I'll remove the 4TB drive and configure the system with four 8TB drives using X-RAID. If the system install cleanly and the four drives pass muster, I hope my backup NAS can restore the data as of two nights ago to the newly created 516.
I've never tried to restore from the old NAS. Is there a method that's recommended?
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