Seeing very slow throughput for RHEL 5.x NFS client NFS mounting a Thecus N7700 NAS with "default" NFS options.

These NAS have embedded Linux OS of some sort. http://www.thecus.com/product.php?PROD_ID=14

dump is trickling along at about 530 KB/s; at this rate, a full dump of a 150GB filesystem will take 3+ days:

DUMP: 3.17% done at 531 kB/s, finished in 81:30

I've had good luck with 'proto=udp,rsize=8192,wsize=8192' on Solaris systems mounting other embedded-Linux NAS (i.e., NetGear ReadyNAS), but this doesn't seem to make any difference with the Thecus.

Anyone have one of these and can suggest options to use?  Thanks.

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