On Sun, 6 Jan 2002, Ian Truelsen wrote: > Recently I have been transferring some large files between my computers. I > have a 100Mbps connection between the two, but the actual transfer speed is > being reported at less than 3Mbps. Now, admittedly, one of the computers has > a UDMA 33 drive, but still, 3Mbps seems awfully low. Is this normal? If not, > what can I look to to troubleshoot the problem?
This is something that I have found confusing myself. If the card's speed is 100 Mbit / sec. Don't I have to first translate that from bits to byte and account for any overhead? If I did that then with a standard 8 bits / 1 byte then I take the 100 x 10^6 Bit / sec = 12,500,000 byte /sec. How much is taken up with a standard Ethernet communication overhead (30%)? If we assume an unreal world number of 0% then the above transmission speed is rather slow in comparison to the ideal. Yet we our HDs IDE/SCSI controller should typically be faster than 12.5MB/sec so where is the bottleneck? You might test each HD via hdparm and see what the average through put is for the drives. Stephen _______________________________________________ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list
