Implementation Guide › Installing CA Enterprise Log Manager › Installation Considerations for a System with SAN Drives › Install with Disabled SAN Drives › Create a Logical Volume

Create a Logical Volume

You can use volume manager software to combine multiple LUNs into a logical volume for CA Enterprise Log Manager to access. Logical Volume Manager (LVM) manages disk drives and similar mass-storage devices on the Linux operating system. Storage columns created under the LVM can be resized or moved on to backend devices like SAN storage.

To create a logical volume

1. Create the first physical volume:

   pvcreate /dev/mapper/mpath0
   

2. Create the second physical volume:

   pvcreate /dev/mapper/mpath1
   

3. Show all the physical volumes on the system:

   pvdisplay
   

4. Create the VolGroup01 volume group. (The VolGroup00 volume group exists.)

   vgcreate VolGroup01 /dev/mapper/mpath0 /dev/mapper/mpath1 
   

   Note: This command creates a volume and makes the two physical volumes part of the group.

5. Create a logical volume within the volume group:

   lvcreate -n LogVol00 -l 384030 VolGroup01
   

6. Create a file system:

   mkfs -t ext3 /dev/VolGroup01/LogVol00