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[Darryl_Gittins]

I'm connected to my D-Link DNS-321 via a Gigbit switch, and I'm using cat5-E cables. I do get good speed in file transfers (a gb file will transfer in 10 sec, I think).

However, when I'm copying big files to or from the device, (especially from a different computer that only has 10/100 nic), I cannot access anything else on the DNS-321, such as a mapped drive on the NAS. For example, I play music files stored on the DNS-321and when I'm copying big files to or from the DNS-321, music stops, plays a moment... stops.... and so on - constantly hanging.


Is this expected behavior for the DNS-321? Is it only capable of handling one task at a time?


Many thanks!!

[gunrunnerjohn]

If you're getting 100mbyte/sec transfers from your DNS-321, you must have plugged it into 440V outlets!  That's way beyond it's capability!

[Darryl_Gittins]

OK, so my math is not so good. I just tested again, and now a transfer of a file from the 321 runs about 10 MB per second and a 1 GB file takes about 2 minutes. I thought it was faster the last time I tried.

Regardless, the issue is that while I'm copying a file to or from the device, any other access to the device hangs.


Many thanks!!

[gunrunnerjohn]

That's actually not all that unexpected.  The sharing is predicated on whoever gets there first with the request.  So, if you have a transfer that saturates the connection, the other requests get interleaved when it gets a chance.  I've seen similar things here with that box.

[Darryl_Gittins]

OK thanks.

Is the speed of my test also expected? Again, I have CAT5e cables and a Gbit switch, and a 1 GB file transfered between two computers that have Gbit nics takes a few seconds, whereas to or from the 321 which is connected to the same Gbit switch takes a couple of minuites for the same file. Is there something in the configuration for the 321 I should look at?

[Darryl_Gittins]

Just did a computer to computer transfer and the transfer speed varied but ran as high as !20 MB/second, whereast the fastest transfer to or from the D-Link DNS-321 has been 12 MB/Second. It seeme the Gigabit aspect of the D-Link DNS-321 is non-operational.

[gunrunnerjohn]

My transfer speeds to/from the DNS-321 are in the same ballpark using gigabit connections.  I get much faster transfers to/from another Windows box and to/from my Synology DS209 NAS box.

I just copied a 699 MB file from the DNS-321 to my desktop, 10.5MB/sec.  An identical sized file from the Synology DS209 NAS copied at 46 MB/sec, quite a difference.

[Darryl_Gittins]

If you're getting 100mbyte/sec transfers from your DNS-321, you must have plugged it into 440V outlets!  That's way beyond it's capability!

Beyond it's capability? It seems to me that according to the dlink advertized specs, it is NOT beyond it's capability.


The DLink products specs boast the following "FEATURES & BENEFITS":

ftp://ftp10.dlink.com/pdfs/products/DNS-321/DNS-321_ds.pdf   

PORTS
+ 1 10/100/1000 Gigabit Ethernet Port
 High-speed Gigabit Ethernet Connectivity
Utilizing SATA hard drives and gigabit connectivity, the 2-Bay Network Storage Enclosure (DNS-321) is a high performance, cost-effective solution for your home or small office data storage needs.

I've never seen anything faster than 10MBps. Therefore, either the product is not working correctly, or DLink is lying in their specifications for the product.

[gunrunnerjohn]

Show me where in the specifications they say that they fully utilize that gigabit connection?  While I agree that 10mbytes/sec is not all that impressive, all they advertise is a gigabit interface and "high-performance".  The definition of "high-performance" is left to the reader to figure out.

[Darryl_Gittins]

So people should accept 10mbytes/sec when DLink advertises  "high-performance" gigabit interface?
Sorry, that's not acceptable. It's deceptive advertizing at very least.

[gunrunnerjohn]

You can do whatever you like, but filling these forums with your rants is unlikely to change anything. 

[Darryl_Gittins]

"Rant"? Is it necessary to be insulting? I do appreciate answers about the device, but I don't appreciate that sort of comment.

I'd think people would want to know what to expect from the device. If the device isn't performing according to expectations, and people are not happy about it,  then that would be something I'd want to see in a forum.

[gunrunnerjohn]

Good grief, read some of the threads here, there are many on performance!  Some folks do a lot better than 10mbytes/sec, though I'm not sure how they do it.

[Darryl_Gittins]

I did read through many threads and the thing that puzzles me is how people accept the poor performance. I maintain that if DLink advertizes Gigabit performance, they need to provide better than 10 Mbps. Even 20 or 30 might be acceptable, but 10 is not.  I do have a case open with Dlink support now, and the case was escalated to level-two support with a tech that agrees with me that the transfer speeds should be much higher. He is testing a unit and will call me back with the findings, which of course I will post here!