Setup guide
Partitioning Disks or LUN devices as LVM-type Primary
Partitions
To achieve optimal performance, each disk or LUN in the DAS array should be partitioned as a single primary
partition of type “Linux LVM”.
NOTE If your storage arrays use 450GB drives, skip this section and continue with Assembling the Disk or LUN
Devices into a Logical Volume on page 38.
To re-partition disk or LUN devices as LVM-type primary partitions:
1 Open a terminal and log in as root.
2 Reload the drivers for the fibre channel card.
■ For HP Z800 systems using the ATTO Celerity FC-84EN card type:
rmmod celerity8fc
modprobe celerity8fc
■ For older HP systems using the ATTO Celerity FC-44ES card type:
rmmod celerityfc
modprobe celerityfc
3 View a list of disks or LUNs devices detected by the operating system, using the following command:
fdisk -l | grep dev
Identify the disk or LUN devices that are part of the DAS that will be configured with a standard
filesystem. These devices will be re-partitioned.
NOTE Make sure you do not re-partition the system drive or any other disks that you want to preserve as
they are. Partitioning destroys all data on the disks.
4 Use the fdisk command to re-partition each disk device identified in the previous step.
Start the fdisk utility for the LUN. Type:
fdisk <disk name>
where <disk name> is a disk device name without a partition number, such as /dev/sdf.
The fdisk utility starts, checks the disk device, and then displays its prompt.
NOTE When fdisk starts, a warning about the number of disk cylinders may appear. You can disregard this
warning.
5 Type n to display the New partition creation menu.
fdisk displays the type of partitions you can create (primary or extended).
6 Create a primary partition on the disk device by typing p at the prompt.
7 When prompted to enter a partition number, type 1 to make the primary partition the first one on the
LUN.
NOTE You may have to delete pre-existing partition by entering d when prompted, and repeating step 3.
8 When prompted to set the starting cylinder number, press Enter twice to accept the default, that is, the
first and last cylinder on the device.
The fdisk prompt reappears.
Partitioning Disks or LUN devices as LVM-type Primary Partitions | 37