やってみますた。
nv_b37, Blade 1000 750MHz, LSI logic SAS1068, T7K250 x3 台
# zpool iostat -v (default の stripe)
capacity operations bandwidth
pool used avail read write read write
---------- ----- ----- ----- ----- ----- -----
mypool 288K 696G 2 3 336K 441K
c2t0d0 220K 232G 0 1 112K 147K
c2t1d0 28K 232G 0 1 112K 147K
c2t2d0 39.5K 232G 0 1 112K 147K
---------- ----- ----- ----- ----- ----- -----

# ptime mkfile 10g testfile_10g
real 1:46.628
user 0.196
sys 41.708

bonnie++:
Version 1.03
------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
machine 8G 25108 98 63450 61 53474 62 23554 97 135876 86 840.4 8
------Sequential Create------ --------Random Create--------
-Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
16 6405 99 +++++ +++ 10016 99 6580 97 +++++ +++ 11205 99
machine,8G,25108,98,63450,61,53474,62,23554,97,135876,86,840.4,8,16,6405,99,+++++,+++,10016,99,6580,97,+++++,+++,11205,99