How can I improve my file tranfer performance

I have file transfers that take 10 hours using rcp. (Huge amounts of data) I want to use SCP but a 1 GB file takes 4mins with a max transfer rate of 4.5 Mb.RCP only take 1.5 mins. (SFTP take only a few second less that SCP)

I have a Sun E10k with 100Mb cards locked at 100/full. Does anyone have a suggestions on how to bring SCP more in-line with the rcp transfer rate?

[425 byte] By [jones4411] at [2007-11-25 22:43:30]