DSM-G600, DNS-3xx and NSA-220 Hack Forum

Try a different switch, I am on a 3Com Office Connect 16 Port Gigabit and the network with 2x DNS-323 is flying.
I have seen unexplained slowdowns in the past when there were 1Gigabit NIC's connected to a 100 Mbit switch/hub, after upgrading the switch the lock up issues have vanished.

Hello fordem,

In my opinion, fragmentation can be ruled out.  Not only is there more than enough space on my local disks, but defragmenting (using diskeeper 10) is performed every two weeks.

Hello Skydreamer,

I have to check the speed of my laptop's (Acer Travelmate 290) Ethernet interface.  All the other NICs are Gigabit.
As soon as I can lay hands on a Gigabit Switch, I'll try this suggestion.  However, I would like to know the real cause of this phenomenon.

Thanks for your replies and I'll keep you informed on any progress.

ON6LW

You can use Wireshark (www.wireshark.org) to look at the TCP/IP
communication between the DNS-323 and a PC, then compare that to the
transfer of the same file/directory between the PC and another PC.

I had a similar problem when I first got my DNS 323.

When I first set it up I got a large .VOB file and ran some speed tests to see if there was much performance increase when I included
a 1Gig switch into my network.

I found that when I first set it all up the DNS 323 would hang frequently about three quarters of the way through the transfers, and a
reset was the only thing to get it out of the problem.

In the end I swapped a full set of CAT5e cables with another set and finally found out that there was a bad cable in my original setup.

Everything is fine now, and I have no more hangs, and the dodgy cable has been marked as only to be used for 100m networks.

Try your cables, especially the one directly connected to the DNS 323.

Highlander

Maybe the internet security kit is using some sort of detection for IP address spoofing and tries to check addresses with name lookups (DNS or Netbios Name Resolution). Maybe it is blocking network transfers as long as it can't match a name to its address.
It's only a guess but you could find that out using Wireshark.

Are you running any firewall software, including windows firewall?  Also, what speed is your network?  Make sure it is actually synced at that speed.  Lastly, if you are copying from 1 drive to the other, you are actually copying the data from the DNS to your computer and then back to the DNS, all through the network.  The best speed for disk to disk transfer is to telnet in and copy the data natively.