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Forum Discussion
Average transfer speed (read and write) plummeted after replacing hard drives
Hello everyone
TL;DR: I just replaced my 3TB hard drive with some brand new 8TB hard drive, and the average speed plummeted, from 70MB (switch 1)/100MB (switch 2) to a steady (but slow) 40MB on bot...
HiEstivalG
A RN102 NAS is the entry level NAS. I am actually surprised that you got 70MB/s + speed before. I had one a while ago for testing various things but I would typically be in the range of 30-50MB/s and that was with a 2TB RAID 1.
Expanding the volume size to 8TB is going to take more processing for the single core ARM CPU and 500MB of ram, housed in the NAS. It is not really unexpected that the speeds are going to drop as a result.
You can of course try to factory default the unit in order to get a clean filesystem. However, with 8TB you are probably starting to hit the upper limit of what the unit can realistically handle.
Perhaps it is time to upgrade NAS since it seems your data needs have increased? I reckon that if you monitor the NAS via top command (or similar) while transferring data you will probably see the unit being flat out.
FWIW, with my own RN102 I was seeing 70 MB/s read speeds after the reset. I was using it as a backup NAS - configured as jbod with 6 TB and 8 TB disks. That was a few years back though, and the memory footprint of the current firmware is bigger now than it was back then.
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