I'm measuring using hdparm -t on the PVs (sda3 and sdb2) and on the LV (work). It's actually faster on the PVs.
Is this really just the way lvm is, or am i doing something wrong?
# lvs -a -o +devices
LV VG Attr LSize Origin Snap% Move Log Copy% Convert Devices
root foobar -wi-ao 165.00G /dev/sda3(10752)
swap foobar -wi-ao 2.00G /dev/sda3(10240)
work foobar mwi-ao 148.52G work_mlog 100.00 work_mimage_0(0),work_mimage_1(0)
[work_mimage_0] foobar iwi-ao 148.52G /dev/sda3(52992)
[work_mimage_1] foobar iwi-ao 148.52G /dev/sdb2(0)
[work_mlog] foobar lwi-ao 4.00M /dev/sdb1(0)