I understand that the NVRAM can only process 16Mb at a time before the system really gums up, but I did expect a little more input performance.
If your F760 is still of the unclustered variety ... then you will currently be enjoying the full 32 MB capacity of your NVRAM.
He's probably referring to the fact that we split NVRAM into two halves, with one being drained while the other is written to. A Consistency Point (CP) creation is forced if you fill up the active half of the NVRAM. If the previous CP has not completed, you're hosed until it does, so in some sense he's correct that, for an F760 or any other filer with 32MB of NVRAM, "the NVRAM can only process 16Mb at a time." Well, 16MB, not 16Mb.
For a more complete description of how this all works, see TR-3002, section 3.5 (http://www.netapp.com/technology/level3/3002.html#I35).
-- Karl Swartz - Technical Marketing Engineer Network Appliance Work: kls@netapp.com http://www.netapp.com/ Home: kls@chicago.com http://www.chicago.com/~kls/