HP 3PAR RedHat and Oracle Linux Implementation Guide

When changing from HP 3PAR host persona 1 to host persona 2 or vice versa:
• A change from persona 1 to persona 2, or from persona 2 to persona 1, requires that
the array ports affected be taken offline, or that the host for which the persona is being
changed be not connected (not logged in). This is an HP 3PAR OS requirement.
• For existing devices targeted in a persona to be claimed, the host must be rebooted.
Use the following procedure:
1. Stop all host I/O and modify the /etc/multipath.conf file on the RHEL host.
2. Shut down the host.
3. Change the host persona on the array.
4. Boot the host.
5. Verify that the target devices have been claimed properly and that the persona setting is
correct.
In addition, a SAN boot configuration requires rebuilding of the ramdisk in order to take
effect.
3. Restart the multipathd daemon for any changes to be effective.
4. Verify that the multipathd daemon is enabled by the rc script to run on every host boot
up.
The following output shows that it is enabled for run-level 3, 4 and 5. Enable it appropriately
for your configuration:
# chkconfig --list multipathd
multipathd 0:off 1:off 2:off 3:on 4:on 5:on 6:off
5. Check that the appropriate rc scripts have been created for each run level. The start number(s)
may not match those shown here.
# ls /etc/rc3.d/*multi*
/etc/rc3.d/S13multipathd
# ls /etc/rc5.d/*multi*
/etc/rc5.d/S13multipathd
Alternatively, you can use the chkconfig command to enable multipathing if it is not enabled:
# chkconfig multipathd on
Starting the iSCSI Daemon for RHEL 6 or RHEL 5
To start the iSCSI daemon for the RHEL host, complete the following steps:
1. To start the open-iscsi module, issue the following command:
# /etc/init.d/iscsi start
Starting iSCSI daemon:
[ OK ]
[ OK ]
78 Configuring a Host with iSCSI