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NFS writing so slow

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Operating Systems Linux Red Hat NFS writing so slow
# 1  
Old 07-01-2009
NFS writing so slow
Hi, I facing an NFS problem. I have machine1, which has diskA and diskB, and machine2, both are Mandriva 2009 Linux.

When I am on machine2 and NFS mount both diskA and diskB of machine1. Writing to diskA is very fast, but writing to diskB is very slow. I tried different mount rsize and wsize options, but it is still very slow on diskB.

I test with sftp to diskB, it is fast. So I think it is the NFS problem, but I could not figure it out how to fix this. Could someone help me with this. Thanks a lot.
# 2  
Old 07-02-2009
Could you give me a idea of the hardware specs on the drives, diskA and diskB. Size of partition, etc?
# 3  
Old 07-05-2009
Could you add also an idea on the network config and the ethernet cards used ?
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