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Extremely Slow Initial Backup


upsidedowncake
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So just a follow up, I've been diving in to this more. First off, I installed the RocketRaid card and wholeheartedly support that decision, it just works nicer than any software RAID's I tried. I am currently testing a file transfer though between my recently reinstalled pc and my recently reinstalled server software, and am noticing the bandwith isn't very fast. At first, I was testing an 80 GB transfer and it was running at about 10 MB/sec, incredibly slow. I found some updated drivers, and now am testing another 80 GB transfer and it started out at 50-60 MB/sec but has now leveled out at 18-19 MB/sec. Do you have any insight on why this might be the case? I have tried two different Cat5e cables all ready, but am wondering if this is also why my backups were so slow. Any help would be great, thanks.

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What are the devices connected to: dedicated Ethernet switch, consumer router, other?

 

Most people in these forums highly recommend using a dedicated Ethernet switch over a consumer router (the switching fabric in consumer routers is typically not very good). It's also highly desirable to have the 2 computers connected to the same switch.

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I just connected them to the same switch as one was connected to the router and the other connected to the switch before. Also, I had to change a lot of the NIC settings on the server as recommended in another post (I can't remember where it was, or who provided it but thank you to them). Doing a direct transfer is now up around 80/90 mb/s. Haven't gotten to the point of trying the backup yet, will be my task today.

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Changing a bunch of the NIC settings has me a little worried. This is not normally required. Do you have a list of them? If so, I would strongly recommend you reset the NIC to defaults and try again that way before trying another backup. If it really slows down you can always re-implement the NIC changes.

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Found the link of what I followed: http://forum.wegotserved.com/index.php/topic/19270-before-you-post-network-performance-issues/ When I went in to the server and looked at these settings, most of the offload and checksum were enabled, also jumbo packets was enabled too. I read somewhere that this has been a problem with RealTek drivers.

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Certainly Jumbo Packets can be a problem. Primarily, the issues arise because of the different ways manufacturers implement Jumbo Packets. And, as you may well have witnessed personally, having Jumbo Packets enabled on 2 devices when the versions are not compatible can lead to dismal LAN performance.

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Well, backup has been running for ~1.5 hrs and is at 10%. I probably should have waited to post this until I hit 100% but looks like I'm out of the woods :D . I will have to start reinstalling all of my programs, would you recommend a couple at a time and then do a backup so I can isolate what was causing my issue? It's purely a vanilla machine right now, I haven't even put Kaspersky back on it.

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Well, backup has been running for ~1.5 hrs and is at 10%. I probably should have waited to post this until I hit 100% but looks like I'm out of the woods :D . I will have to start reinstalling all of my programs, would you recommend a couple at a time and then do a backup so I can isolate what was causing my issue? It's purely a vanilla machine right now, I haven't even put Kaspersky back on it.

 

Wow, that is still a lot of time. My desktop is about 100 gigs and its first backup didn't even take 60 minutes.

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