Comment # 7 on bug 1033691 from zhen ren

read-ahead.sh failed:

- testing log
[ 0:00] test $(blockdev --getra "$DM_DEV_DIR/$vg/$lv") -eq 768
[ 0:00] ##read-ahead.sh:38+ blockdev --getra @TESTDIR@/dev/@PREFIX@vg/LV
[ 0:00] #read-ahead.sh:38+ test 1024 -eq 768

- verify
# blockdev --getra dev/mapper/LVMTEST16533pv1
768
# blockdev --getra dev/LVMTEST16533vg/LV
1024

- code snip
#COMM "read ahead is properly inherited from underlying PV"
blockdev --setra 768 "$dev1"
vgscan
lvcreate -n $lv -L4m $vg "$dev1"
test $(blockdev --getra "$DM_DEV_DIR/$vg/$lv") -eq 768 

Looks readahead size isn't inherited from underlying PV anymore?