[linux-lvm] Problem with lvchange command

[Sachin Sant]

Hi , I posted this query , but did not get a reply. Sending it again
hoping will get a reply.

I have a VG with 3 pv and a lv created using command 

lvcreate -i3 -I32 -l98 -nmy_lv my_vg
lvdisplay shows 1024 as the value for Read Ahead Sectors.

When i use the command lvchange to change the value of read ahead
sector count with value more that or equal to 256 i get following
error..

linux# lvchange -r 340 /dev/my_vg/my_lv
lvchange -- ERROR "Invalid Argument" read ahead sector change
linux#
linux#

Is there a limitation that read ahead value cannot be greater 
than 255?

-- 
Thanks
-Sachin