On 02/19/2015 09:27 AM, Tim Dunphy wrote: > And I want to correlate that to the output of fdisk -l, so that I can feed > the disk partition I want to iostat, how would I go about that? lvdisplay --maps /dev/mapper/MysqlVG-MysqlVol That'll show you which PVs are used for the LV. But, just given your fdisk output, I'd guess that you're going to find that all of the extents are on /dev/cciss/c0d1p1, and watching that will produce exactly the same output as watching /dev/mapper/MysqlVG-MysqlVol. Try it: iostat -x 2 /dev/mapper/MysqlVG-MysqlVol /dev/cciss/c0d1p1 Or just watch all of your block devices by not naming any: iostat -x 2