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Aright. I just got myself a late xmas present, and im wondering if its all going okay..
Basically i have these hooked up, all with brand new cat6e cables:
DNS-323 hooked to
DGS-2208 hooked to
DIR-655
The 323 is the nas, the 2208 is a 8 port dlink gigabit switch, and of course the dir-655 is a gigabit router.
As i said, all are hooked up via cat6e, and ive turned jumbo frames on on my marvel yukon gigabit port on my motherboard, along with the NAS ( i understand the router does this auto? ).
Anyways, i also have 2 xbox 360s hooked up to the switch, an internet modem ( obviously ) and a ps3 along with the pc.
Gigabit speeds from the pc to the 323 are around 10-15 megabytes per second, but only using teracopy. Vista only copes from like 3-7 megabytes per second.
My question is.. Should i be getting more throughput? All the hard drives on the lan are 7200 rpm models, but i figured id get closer to 20-50 megabytes per second.
Whats wrong, or is this where i should be? Thanks in advance.
Oh and the PC im using to transfer is:
q9450
4gb ram
6x500gb 7200 rpm drives
asus p5g deluxe
yadda yadda ( onboard dual gigabit lan hookups )
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You will not get 20-50 MB/s, the unit is not capable of these kinds of speeds.
I have a DIR-655, 2 DGS-2208 switches and 2 DNS-323s (and a bunch of 10/100 switches, etc.) and I consistantly get 15-19 MB/s transfer rates between my computers (1 Vista Business, 1 Vista Ultimate, and 1 XP Pro) and the DNSs. I also have several computers via wireless that get lower, not to mention printers and other assorted network periphrials.
The first thing I would do is to turn off jumbo frames and see what you get. Also, do you have the ftp server, itunes server, or UPNP servers turned on? Turn those off and see what you get. Also, on the Vista machine, turn off windows firewall and see what happens. All these things can slow down transfers. Also look for any on demand virus scanners, they can also be a culprit.
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20-40MB/s is certainly possible if setup right. I have a DNS 323 and my desktop PC with a cheap onboard Realtek PCI-E 1000Mbps connected to my DIR 655. When I first set it up I made the mistake of not turning on Jumbo Frames and the most I got was 10-15MB/s. I then enabled Jumbo Frames on the DNS 323 and that actually slowed things to 10-12MB/s. The missing piece of the puzzle was that I had to turn Jumbo Frames on my Realtek adapter as it was disabled by default. Once I had Jumbo Frames turned on for all devices with the same MTU, the transfer rates rocketed through the roof.
I have two Seagate 7200rpm 1TB drives in RAID1 and I get sustained writes of between 18-20MB/s and sustained reads between 22-30MB/s. Although I have seen it go as high as 40MB/s for a brief period I think this was more to do with caching and doesn't happen that often.
I've also turned off all unnecessary services on the DNS 323; FTP, AV, iTunes, etc. Also If you are using Vista apply Service Pack 1 as that speeds up SMB file transfers in certain circumstances. Antivirus software could also be the culprit; I use Avast Home Edition as it seems to be fairly light on resources and doesn't impact on SMB transfers at all.
My desktop systems is a Q9550 with 4GB RAM and a single 500GB 7200rpm HDD which is comparible to yours.
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Jumbo frames can be flaky; turn them off and do a base line test. Transferring large files (an ISO image or a large movie file) with a gigabit network should yield 15-18MB/s speeds. Your numbers shouldn't be way off. Once you have an idea about the basic setup, you can tweak jumbo frames settings then.
Also, do you have Vista service pack 1? If not, you should install it before testing network transfer speeds.
Last edited by blahsome (2009-01-13 00:05:51)
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