HP XC System Software Installation Guide Version 3.1

Mount the /hptc_cluster File System on an HP SFS Server
During the HP XC system configuration process, you might have decided to install the /hptc_cluster
file system on an HP SFS server to provide failover capabilities. Thus, if you want this file system located
on an HP SFS server, you must mount the mount the /hptc_cluster now. The SFS Client Installation
and User Guide describes how to mount the /hptc_cluster file system on an HP SFS file system.
Create and Mount the /hptc_cluster File System Locally
If you intend to put the /hptc_cluster file system on a local disk, you must create and mount the
/hptc_cluster file system now on a local disk and partition of your choice.
Remember to reformat the file system using the appropriate utility (such as mkfs) to clear out old data.
3.7.8 Modify Workstation Model Names in the Database
Perform this task if the hardware configuration contains HP wx8400 workstations. Bypass this task if the
hardware configuration does not contain this model of HP workstation.
Follow this procedure to correctly identify HP xw8400 workstations in the configuration and management
database:
1. Begin this procedure as the root user on the head node.
2. Change to the following directory:
# cd /opt/hptc/config/sbin
3. Modify the workstation model name in the database. In the following command, node_list represents
the list of nodes that are xw8400 workstations.
Enter the node_list in the format, node_prefix[n-n], where n is the node number. For example,
n[1-3,7,8].
# ./modify_node_type "hp workstation xw8200" \
"HP xw8400 Workstation" node_list
3.7.9 Enable Software RAID-0 or RAID-1 on Client Nodes
This task is optional. Perform this task only if you want to configure software RAID-0 or RAID-1 on client
nodes.
You have the option to enable software RAID-0 (striping) or software RAID-1 (mirroring) on client nodes.
RAID is an acronym for redundant array of inexpensive (or independent) disks. RAID is a way of combining
multiple disks into a single entity to improve performance or reliability or both.
Software RAID-0 (striping) enables client nodes that have more than one storage disk to split data evenly
across the disks. Striping is typically used to increase performance. However, because there is no parity
information for redundancy, reliability is reduced. A single disk failure affects both disks. Software RAID-0
is not supported on the head node.
When a client node is imaged with software RAID-0 support, the /boot partition is mirrored and swap
partitions on each disk are not striped or mirrored. Linux automatically stripes across swap partitions
when the swap partitions are on separate disks.
Software RAID-1 enables client nodes that have more than one storage disk to increase reliability by
maintaining a redundant (mirrored) disk copy. When a node is imaged with RAID-1 support, the entire
disk is mirrored. If a disk fails, nodes can continue to run using the other disk.
To enable software RAID-1 on a client node, the following criteria apply:
• The client node must have two or more disks; only two disks are used in the RAID set.
• Disks must be the same size.
Follow this procedure to configure software RAID-0 or RAID-1 on one or more client nodes:
1. Use the text editor of your choice to edit the following configuration file on the head node:
62 Configuring and Imaging the System