HP: Creating logical volumes¶

Title:: HP: Creating logical volumes
Author:: Douglas O’Leary <dkoleary@olearycomputers.com>
Description:: HP: Creating logical volumes
Date created:: 05/2005
Date updated:: 06/2006
Disclaimer:: Standard: Use the information that follows at your own risk. If you screw up a system, don’t blame it on me…

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

Create a volume group which will hold the logical volume. Please see HP: Creating Volume Groups
Determine how to place the LV on the VG’s disks.
- Default - LVM will handle the LV placement:
```
lvcreate -L ${Size-megs} ${vg}
```
- Manual - Sysadmin determines where LV goes.
  - Set an array of disks on which the LV will reside:
    set -A disks $(list_o_disks)
  - Create the logical volume definition:
    lvcreate -i ${stripe_width} -I ${stripe_size} \ -n ${lvol_name} ${vg}
  - Expand the LV to the appropriate size:
    lvextend -L ${Size-megs} ${lv} ${disks[*]}
If appropriate, create a filesytem. Please see Creating Filesystems for details.

OCI