Release Notes Device Mapper Multipath Enablement Kit for HP StorageWorks Disk Arrays v4.2.0 (AA-RWF9G-TE, March 2009)

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NOTE:
• For SLES 10 SP2, in the device section, replace
“/sbin/mpath_prio_alua %d”prio_callout
with
aluaprio
• For SLES 10 SP2, in the device section for MSA 2012sa, replace
“/sbin/hp_scsi_id —g —u —n —s /block/%n”getuid_callout
with
“/sbin/scsi_id —g —u —n —s /block/%n”getuid_callout
• For more information on editing /etc/multipath.conf file, see the Device Mapper Multipath
Enablement Kit for HP StorageWorks Disk Arrays 4.0.0 Installation and Reference Guide. You
can find this document on the Manuals page of Multi-path Device Mapper for Linux Software,
which is accessible at http://www.hp.com/go/devicemapper.
Setting up HPDM Multipath
Setting up HPDM Multipath includes configuring HBA and iSCSI initiator parameters for multipathed
environment. This involves the following:
• Configuring QLogic HBA parameters
• Configuring Emulex HBA parameters
• Configuring iSCSI parameters
Configuring QLogic HBA parameters
To configure the QLogic HBA parameters for QLogic 2xxx family of HBAs, complete the following
steps:
1. Edit the /etc/modprobe.conf file in RHEL hosts and /etc/modprobe.conf.local file in
SLES hosts with the following values:
• For RHEL 5 U3 operating system using the native Qlogic drivers,
options qla2xxx ql2xmaxqdepth=16 qlport_down_retry=10 ql2xloginretry-
count=30
• For other operating systems using the HP Qlogic drivers,
options qla2xxx ql2xmaxqdepth=16 qlport_down_retry=10 ql2xloginretry-
count=30 ql2xfailover=0 ql2xlbType=1 ql2xautorestore=0xa0 ConfigRe-
quired=0
2. Rebuild the initrd by executing the following commands:
• For RHEL 5 U3 operating system using the native Qlogic drivers, complete the following steps:
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