loland
asked on
Slow transfer Mac to PC Fine from PC to Mac and PC to PC
We have a Gigabit ethernet setup that is connected with several PC's and one Mac G4 733MHz. We are running Cat7 cabling and TCP/IP. Our server is a W2K with a Raid solution.
The problem is the slow transfer rate from the Mac to the server (we are transfering big video-files >1G Byte). The transfer rate we are currently experiencing is around 3-5 Mbyte/s from the Mac but to the Mac from the server is around 22MB/s and the same both ways from PC to server and back again.
Any help is greatly appreciated.
The problem is the slow transfer rate from the Mac to the server (we are transfering big video-files >1G Byte). The transfer rate we are currently experiencing is around 3-5 Mbyte/s from the Mac but to the Mac from the server is around 22MB/s and the same both ways from PC to server and back again.
Any help is greatly appreciated.
weed
Are you running OS 9 or OS X?
ASKER
We have tried both with the same results.
Thanks.
Thanks.
If it were a client software problem you would have seen a difference between OS 9 and OS X. I'd look to either the server or the cabling. Is there connection throttling going on? Run a diagnostic on the server drives? Is there a significant difference between read and write speeds?
ASKER
Thanks again for helping.
I have tried the Mac with 2 different cables and even directly hooked it up to the server gigabit card but that didn't help. Everything works as it should between PC's and server both ways. There's nothing wrong with the drives on the server or the Mac. Actually we get similar results when we hook up two Macs (G3 and G4) over 100Mbit ethernet but then even at slower speeds <2 MByte/s one of the ways and 7-8MByte/s the other way wich is fine (Goes via TCP/IP through a router and a hub). What do you mean with connection throttling? And as mentioned this slow speed occurs only when a Mac writes to the W2K server. There is no unusual CPU utilisation on the W2K server.
I have tried the Mac with 2 different cables and even directly hooked it up to the server gigabit card but that didn't help. Everything works as it should between PC's and server both ways. There's nothing wrong with the drives on the server or the Mac. Actually we get similar results when we hook up two Macs (G3 and G4) over 100Mbit ethernet but then even at slower speeds <2 MByte/s one of the ways and 7-8MByte/s the other way wich is fine (Goes via TCP/IP through a router and a hub). What do you mean with connection throttling? And as mentioned this slow speed occurs only when a Mac writes to the W2K server. There is no unusual CPU utilisation on the W2K server.
Wait a minute. You get slow speeds when you hook 2 macs together but then "this slow speed occurs only when a Mac writes to the W2K server."....?
ASKER
Sorry for the confusion.
When I wrote the first question I hadn't tried transfering from the Mac we're having problems with to another Mac. (Becausce we didn't have one available and the use for us will be G4's or G5's connecting to a W2K server).This test showed also a very slow transfer rate through TCP/IP (on the same subnet). This test was done just to see if transfering between two Mac's went OK but it didn't. Anyways our main problem is still with our G4 and the W2K server. I've seen other comments on slow transfer rate but until now I have yet to see anyone solving it.
When I wrote the first question I hadn't tried transfering from the Mac we're having problems with to another Mac. (Becausce we didn't have one available and the use for us will be G4's or G5's connecting to a W2K server).This test showed also a very slow transfer rate through TCP/IP (on the same subnet). This test was done just to see if transfering between two Mac's went OK but it didn't. Anyways our main problem is still with our G4 and the W2K server. I've seen other comments on slow transfer rate but until now I have yet to see anyone solving it.
SOLUTION
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ASKER
We've tried connecting the Mac directly to the server but only through the Gigabit ethernet card and not using a crossed cable. (As you know you shall not use a crossed cable on Gigabit) the result is about the same. I could however try to connect the mac to the 100Mbit card we have in the same server. I'll try that later today with a crossed cable and see if that improves anything).
Hardware! Apple System profiler tells you what speed the mac is connecting at. Check the switch (software is better than looking at lights) And see what speed the switch thinks it is connected at. Also chk for half or full duplex.
ASKER CERTIFIED SOLUTION
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ASKER
We're running our switch on full duplex and both the PC server and the Mac reports gigabit connection.
Our switch has very limited options in what we can do in setup. (Trendnet TEG-S80TX).
However we just installed OS 10.2 and that helped a lot so we have a reasonable filetransfer speed but when digitizing video to the server we still get dropped frames. We will look into the server a bit more and se if there's more to do. SP3 W2k will be installed among some other things like VIA chipset upgrade.
The file transfers are faster using AFP than SMB.
Our switch has very limited options in what we can do in setup. (Trendnet TEG-S80TX).
However we just installed OS 10.2 and that helped a lot so we have a reasonable filetransfer speed but when digitizing video to the server we still get dropped frames. We will look into the server a bit more and se if there's more to do. SP3 W2k will be installed among some other things like VIA chipset upgrade.
The file transfers are faster using AFP than SMB.
For reasons stated below, proposed answer rejected
Computer101
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Sounds like he got it mostly figured out with an OS update.
ASKER
I would like to thank all of you that has tried to answer my puzzle.
We at our end have tried a lot. We are very happy with the speed now as we awerage around 34 MB/s to/from our G4's. It got mostly solved by several upgrades of the OSX and changing Gigabit ethernet card in our server from Intel Pro 1000 to Alachritec (higly recommended card).
We have still some FCP4 issues but that is another question.
Again thank you all for participating and escpecially a thank you to mr. weed.
We at our end have tried a lot. We are very happy with the speed now as we awerage around 34 MB/s to/from our G4's. It got mostly solved by several upgrades of the OSX and changing Gigabit ethernet card in our server from Intel Pro 1000 to Alachritec (higly recommended card).
We have still some FCP4 issues but that is another question.
Again thank you all for participating and escpecially a thank you to mr. weed.