HP 3PAR Upgrade Pre-Planning Guide

3 Red Hat, Oracle, Linux, and SUSE Guidelines
Observe the following host configuration guidelines when planning an online HP 3PAR OS upgrade
for Red Hat, Oracle, Linux, or SUSE OS:
• The SCSI timeout value for RHEL 4 and SUSE 9 must be changed from the default of 30 seconds
to 60 seconds. To change the timeout value, see the HP 3PAR host OS implementation guide
specific to the OS. This needs to be performed for both FC- and iSCSI-connected hosts.
• QLogic drivers for SUSE 9, 10 and Red Hat 4, 5 should be running with driver parameter
PORT-DOWN retry count (qlport_down_retry) set to 1. To set the value, see the HP 3PAR
host OS implementation guide specific to the OS.
NOTE: If the HP 3PAR StoreServ Storage array is running HP 3PAR OS 3.1.1 or later you
must modify the HBA parameter by setting qlport_down_retry to 10.
If the HP 3PAR StoreServ Storage array is running an HP 3PAR OS version earlier than 3.1.1,
set qlport_down_retry to 1.
• For hosts using Oracle Clusterware, make the following required changes or adjustments
before performing an upgrade:
◦ For 10gR1 10.1.0.x and 10gR2 10.2.0.1 (without bug 4896338 patched), set css
miscount to 195:
#set css miscount=195
◦ For 10gR2 10.2.0.1 (with bug 4896338 patched) and later, 11gR1, and 11gR2, css
disktimeout must not be lowered from its default value of 200.
◦ For all Linux hosts with Oracle Clusterware, install and adjust Linux Hangcheck tick
parameters to 30 seconds.
18 Red Hat, Oracle, Linux, and SUSE Guidelines