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Forum Discussion
RN314 with 2 EDA500, new volume sync causes system lockup
When creating a new volume on my second EDA500, the sync process will eventually cause a system lockup. My indication that this has occurred is the progress information on the LED screen of my RN314 ...
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Thank you for sending in the logs.
Checking your disks (diskinfo, smart_history) all seems to be clean and healthy. the only status log I am wary of would be both of your volume are playing on 80-90% of capacity consumed, this greatly degrades performance of the NAS. Also, quota reaches over 90%.
You may want to try disabling quota and freeing up space on both of your volumes and run volume maintenance before recreating your 3rd volume.
HTH
Regards
The EDA500 can be problematic that way because it uses eSATA port expansion. Basically, it sends the data to/from the dives through an interface designed for just one. With all the read/writes required for a sync, it can get really bogged down. That, in turn, bogs down the BTRFS processes that create the volume and can also bog down the readynasd (GUI) process. I did that to me on a 516, so I can imagine its worse on the lower-powered 314.
I always used to open an SSH session during syncs, scrubs, and balances so I could run TOP and see what was gong on if I lost GUI and/or SMB connectivity.
The good news for you is that even though readynasd sometimes reached 100% CPU usage (which I feel is a bug in this situation), so I lost all connection except via ssh, the process actually continued on and ultimately completed. Hopefully, that will happen for you as well. If the drive lights are still active, it probably is. But since a sync on an EDA500 can take an etermity, and all those bogged down processes are slowing it more, it is hard to deal with not having at least some idea of when it will complete.
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