A little setback....  We found out that we also have the issue with the Dell 
H800 controllers, not just the LSI 9200-16e.  With the Dell it's initially 
faster as we benefit from the cache, but after a little while it goes sour- 
from 350MB/sec down to less than 40MB/sec.  We've also tried with a LSI 9200-8e 
with the same results.

So to recap...  No matter what HBA we use, copying through the network to/from 
the external drives is painfully slow when access is done through either NFS or 
iSCSI.  HOWEVER, it is plenty fast when we do a scp where the data is written 
to the external drives (or internal ones for that matter) when they are seen by 
the Nexenta box as local drives- ie when neither NFS or iSCSI are involved.  

What now?  :)
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