Oliver Ransom wrote: > Hi everyone. > > This isn't specifically a CentOS question, since it could apply for > any distro but I hope someone can answer it anyway. > > I took the following steps but was puzzled by the outcome of the test > at the end: > > 1. Create a RAID1 array called md3 with two 750GB drives > 2. Create a RAID1 array called md9 with two 500GB drives > 3. Initialise md3 then md9 as physical volumes (pvcreate) > 4. Create a new volume group called "3ware" with md3 (helps me > remember what controller the disks are on) > 5. Use vgextend and add md9 to the 3ware volume group. > 6. Add a logical volume filling the volume group then create a ext3 > filesystem on the entire volume. > > Now I started moving a lot of data onto the volume and iostat said all > the data was being written to md9. Why that array? How does it decide > which physical volume to write to? > > I could not find any documentation or information online about how > exactly this works. > What ? no documentation covering LVM admin on/for CentOS ? hmm, is http://www.centos.org/docs/5/html/5.2/Cluster_Logical_Volume_Manager/ not reachable from your side ? How have you configured you LV ? linear or stripped ? -- -- Fabian Arrotin idea=`grep -i clue /dev/brain` test -z "$idea" && echo "sorry, init 6 in progress" || sh ./answer.sh