...not sure if I'm in the right forum here - doubtless I'll be told :)

I've developed a zFS aggregate & am loading it up with a fairly large
amount of data.
I keep on seeing console messages sequences like:

IOEZ00078E zFS aggregate <cluster name> exceeds 99% full (1282681/1285920)
(WARNING)
IOEZ00312I Dynamic growth of aggregate <cluster name> in progress, (by user
xxxx).
IOEZ00309I Aggregate <cluster name> successfully dynamically grown (by user
xxxx).
IOEZ00078E zFS aggregate <cluster name> exceeds 99% full (1285920/1289160)
(WARNING)

My question is with regard to the amount that the aggregate has grown by.
The difference between the '1285920' and '1289160' is 3240 - presumably
that is # 8k-byte blocks, but available documentation appears to be
woefully inadequate.
Who defines that '3420'? I certainly didn't specify it when creating the
cluster, nor with any parm value when formatting it with IOEAGFMT. When I
look at either IOEFSPRM or IOEPRMxx, all I see is a bunch of comment lines.
How can I override this value? I expected to see something far larger...

Any help would be much appreciated

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