nukeman Posted May 22, 2015 Share Posted May 22, 2015 I'm hoping someone has some advise for my issues with my new unraid server. I just got the server stood up and my first task is to copy all my media off my previous nas (an ancient Dlink DNS-323). I was able to successfully copy some files but my speeds were horrible, less than 1MB/s write speeds.  First my setup: SuperMicro X10SLH-F, Bios 3.0, 2x Intel i210AT LAN ports Xeon E3-1231 v3 2x8GB Hynix HMT41GU7MFR8C-PB (supported) 2x Toshiba 5TB 7,200 RPM PH3500U-1I72 (1 for data, 1 for partiy). Both drives passed preclear successfully, no SMART errors 1x Samsung 250GB 850 EVO MZ-75E250B/AM (cache) Consumer gigabit switch Dlink (DGS-2208) Fresh install of unRAIDServer-6.0-rc3-x86_64, NerdPack is the only plugin, Trial key at this point Both the unraid box and the old nas are connected with CAT6 cables to the gigabit switch. Gigabit is recognized on both devices My plan: I didn't enable the cache drive because I knew I would be copying TB's of data, and didn't want to fill it up I did enable both the parity and data drives initially. I allowed the parity to be built before I started. I used an rsync command line this: rsync -azPh root@nas_old.home:/mnt/HD_a2/media/test/ /mnt/disk1/test/  The results: Write speeds hover around 600 kB/s I'm gathering that with parity enabled I should be seeing 40-50 MB/s I removed the parity drive from the array leaving only the data drive and the results were the same I've been doing a lot of reading. I know problems like this have so many variables, everything from chipsets, LAN adapters, drivers, jumbo frames, cables, the list goes on and on. I also know it's difficult to do apples to apples comparisons with so many different variables. I'm no rsync expert, but that command seems pretty simple. I guess I could connect the unraid box to the dns-323 with a crossover cable and run the command from the IPMI interface. That would eliminate the LAN. I did try copying an iso from my windows laptop via the SMB share and the speeds were a little better at 2.5 MB/s (measured by windows). Eventually I'll have the cache (SSD) drive enabled so I might not feel this pain, but I want to make sure there's not something significantly wrong first. This thread seems to have a similar issue, but that's unraid 5 and X9 rather than X10.  I'm hoping someone with a simliar setup has had simliar issues. Anyone have any ideas? Are there better ways for me to copy files? Are there better tools to measure transfer rates? How should I continue troubleshooting? syslog.zip Link to comment
sureguy Posted May 22, 2015 Share Posted May 22, 2015 Try from your PC via smb and see what speeds you get there. This will rule out the dns323. It's been a long time since I copied from my dns323 to get unRAID, but I recall seeing between 8-11 MB/s with large files.  This was using a computer on the network to initiate the copy command.  Link to comment
nukeman Posted May 22, 2015 Author Share Posted May 22, 2015 Interesting, when I did do a copy from my windows laptop and as I mentioned, the speeds were about 2.5 MB/s. What I didn't mention was that was via wifi. I knew wifi would be slower, but I thought it would be better than 2.5 MB/s. Your post prompted me to plug my laptop into the gigabit network directly. When I started the same transfer, the speed was right around 100 MB/s! So, you may be on to something, it may be the DNS-323. Two questions: Is 2.5 MB/s on a 54 Mbps wifi connection reasonable? Is there anyting I can do to make the DNS-323 read faster? It's RAID 1. Can I just take a drive out and try to use it in the unraid box directly?  Link to comment
nukeman Posted May 25, 2015 Author Share Posted May 25, 2015 Just a note. I determined that the DNS-323 was the issue. Since it is RAID 1 I just took out one of the drives and connected it directly to the unraid box. I then mounted it (outside the array) and copied the data over. Link to comment
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