Date: Fri, 30 Jan 2004 03:41:04 +0000 From: "Matt Hanson" <[EMAIL PROTECTED]> Subject: Re: [LIB] Networking problems
On Jan 2004 19:47:14 +0800 Raymond wrote:
Firstly, firewire cards (and, to a lesser extent, USB2.0 devices) have onboard controllers.
That explains a whole lot right there Raymond. Thanks for the run down. I don't suppose two PCs can be connected together via Firewire or USB2 to transfer files, can they? Where there's a will, there's probably software.
On Thu, 29 Jan 2004 20:33:48 +0100 Philip wrote:
Just for reference, I checked the transfer speed here with 3 LAN PC-Cards: (Lib110 <-> 1.6+ Ghz AthlonXP all Win2K), copying 79 MB with plain NETBEUI/Netbios (not over TCP/IP, as that is 5-10 % slower due to TCP overhead):
- Xircom CEM33 (10 Mbps / full duplex): 2 min 18 sec - Conceptronic CON100TCL (100 Mbps / full duplex): 0 min 47 sec - IBM 10/100 Etherjet (100 Mbps / full duplex): 1 min 02 sec (oh and yes, I got a switch in between),
so the fastest effective rate I got is in the order of 1.4 >MByte/second. I'm afraid that's as fast as one can get on a L110, >probably slower on a L100 (lower CPU speed), not to mention L70. BTW It's remarkable that the 32bit Cardbus IBM Etherjet (actually rebranded Xircom) is actually slower than the 16bit Conceptronic.
Wow... that's impressive relative to what I'm getting. I'm fuzzy on the math again though. You said the best rate you got was 1.4MB/s. I know there are various ways to report file size, so I guess I'm just picking nits here. But you said you transferred 79MB of data in 47 seconds with the Conceptronic card. 79MB/47s = 1.68MB/s by my math.
Converting to Mbits/sec:
1.68MBytes/s x 8bits/byte = 13.4Mbits/sec 1.4MBytes/s = 8bits/byte = 11.2Mbits/sec
Either transfer rate is more than double what I'm seeing. That was for the Cenceptronic card. The IBM card weighs in at 10.2Mbits/sec... not shabby in it's won right. Your Xircom is seeing about the same at 4.58Mbits/sec as my Xicom & Linksys.
So between the right hardware, and the right drivers as Raymond, higher transfer speeds on LANs >are< possible. But..... aaaccckkk... this reminds me of the headaches I had trying to find a modem for a typical modern desktop a few months that would connect and transfer data consisitantly at 4+KBPS. Don't know why, but 4 modems from Fry's in CA wouldn't connect/transfer faster than 3.3KBPS. Puttoing the generic modem I had in a system into the problem PC saw 4+KBPS connections/tranfers on ebvery connection. And I found few people who could explain much.
NIC brands do make a big difference, as some take 60-80 % CPU time, especially in 100Mbps mode, while other brands do a lot by themselves and leave more CPU time for other processes. Cheap NIC cards rarely perform as well as e.g. 3Com, Xircom, .... It is really a matter of value for money here.
So are there NIC cards with onboard controllers like the Firewire amd USB2 cards Raymond mentioned?
Matt
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