HP: Creating Logical volumes

Logical volumes can be used either for filesystems or for RDBMS raw partitions. Either way, the procedure for creating them are the same:

1. Create a volume group which will hold the logical volume. Please see Creating Volume Groups
   
   
2. Determine how to place the LV on the VG's disks.
   1. Default - LVM will handle the LV placement:
      
      lvcreate -L ${Size-megs} ${vg}
      
      
   2. Manual - Sysadmin determines where LV goes.
      1. Set an array of disks on which the LV will reside
         
         set -A disks $(list_o_disks)
         
         
      2. Create the logical volume definition:
         
         

         lvcreate -i ${num of disks to stripe across} \
         > -I ${stripe_size} -n ${lvol_name} ${vg}

      3. Expand the LV to the appropriate size:
         
         lvextend -L ${Size-megs} ${lv} ${disks[*]}
         
         
3. If appropriate, create a filesytem. Please see Creating Filesystems for details.