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RN104 - Added 4 new 4TB drives. 2.5 days to Resync. Start copying files, or wait til it's done?
I think I crammed most of it in the title... I just added four new 4TB drives (WD40EFRX) to an empty RN104 running the latest OS. (6.4.0) On boot, it began a Resync that is estimated to take ...
The Sync is done on the block level of the drives, so even thoug hthey are empty, they still need to be resynced.
If it is that critical to copy the data across, you can start adding data while the resync is taking place. Although you will take a significant performance hit, on both the Sync and the write speed. AND, you will not have the benefit of reduncancy until the resync is finished.
Unless it is critical data, my suggestion would be to wait until the resync is finished, THEN copy the data across.
elfworks wrote:
Is it possible to shut the RN104 down before the resync finishes, or will it have to restart the resync on reboot? (I'd like to move the NAS off my desk and into the basement with the other server. I didn't realize it was going to be stuck on my desk for three days once I booted it. I'm afraid I'm going to bump into it and corrupt the resync.)
You are supposed to be able to shut it down. It might cost you some time (it is possible it will resync from the beginning). If you can leave it there, that would be best.
If you are careful, you can move it to the floor while it is running. There is a fair amount of angular momentum (think gyroscopes or flywheels) so if you do that try not to rotate it.
On the subject of copying:
Since I'm copying from another NAS box, I was planning on using the Backup service in the ReadyNAS control panel to copy the old NAS server to the new one. I figured that would copy the files directly between the two NAS devices. I did a small backup as my test, and it seemed to work fine - it was just slow because of the resync going on in the background.
Teracopy would be great if I was copying from my local machine, but I'm guessing it would probably double my network traffic to use my machine as the middle man?
For NAS to NAS I use rsync frontview backup jobs (one share at a time usually). You can speed it up some if you use NFS, then edit the job to use Rsync and rerun.
Using Teracopy (or robocopy) would double the traffic load. With a switch, that has little effect on the network if you use ethernet. The switch should have enough internal bandwidth to keep up, and gigabit is full duplex. But still, its'
I was able to shut down the RN104 without issue. When it booted, it continued resyncing from the point it left off. (18.2% done and counting! Woohoo!)
So, it looks like you don't lose any resyncing if you have to shut it down for any reason.
Thanks for the tip about using Rsync and NFS! I will read up on those features. (I've got time. It'll be at least two days before it's done resyncing. :) )
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