Red Hat ENTERPRISE LINUX 4 - DM MULTIPATH Manuale di Servizio

Installation and Reference GuideDevice Mapper Multipath Enablement Kit forHP StorageWorks Disk ArraysV ersion 4.0.0Par t number: AA-RW8RD-TEFirst edit

Supported arraysEVA 3000 (HSV101) VCS 4.007 or laterEVA 5000 (HSV111) VCS 4.007 or laterEVA 4000 (HSV200) XCS 5.110/6.100 or laterEVA 6000 (HSV200) XC

• For all OS:aaa_base acl attr bash bind-utils bison bzip2 coreutils cpio cppcracklib cvs cyrus-sasl db devs diffutils e2fsprogs file filesystemfillup

Configuring Emulex HBA ParametersTo configure the Emulex HBA parameter, complete the following steps:1. For Emulex lpfc family of HBAs:•InRHEL4hosts,edi

3Configuring HPDM M ultipathThis chapter addresses the following topics:• Using /etc/multipath.conf File• Starting HPDM MultipathUsing /etc/multipath.c

Table 3 HP Recommended configuration parametersAttributeDescriptionSupported valuespath_grouping_pol-icyUsed for applying the policy to the multipath d

For EVA400 0/6000 - (HSV200)device{vendorproductpath_grouping_policygetuid_calloutpath_checkerpath_selectorprio_calloutrr_weightrr_min_iofailbackno_pa

For EVA4400 (HSV300)device{vendorproductpath_grouping_policygetuid_calloutpath_checkerpath_selectorprio_calloutrr_weightrr_min_iofailbackno_path_retry

device{vendorproductpath_grouping_policygetuid_calloutrr_weightrr_min_iopath_checkerfailbackno_path_retry"HP”"OPEN-*"multibus"/sbi

18Configuring HPDM Multipath

4 Using HPDM MultipathThis chapter addresses the following topics:• Creating an Alias using /etc/multipath.conf file• Using Multipath Map• Supporting C

© Copyright 2008 Hewlett-Packard Development Company, L.P.Confidential computer software. Va lid license from HP required for possession, use or copyin

udev_dirpolling_intervalselectorpath_grouping_policygetuid_calloutprio_calloutpath_checkerrr_min_iorr_weightfailbackno_path_retryuser_friendly_names/d

For example, in a typical configuration, a Linux host with a dual por t HBA is connected to an EVA4000 through two switches. In this case, if all the p

Example 3. Failover and FailbackIf group A has sdad and sdo,andgroupB has sdj and sdy, the failover occurs from group A to groupB and the failback occ

Configuring SteelEye LifeKeeper with HPDM Multipath DevicesHPDM M ultipathdevicesintheclusteredenvironmentcanbeusedforfile systems having Lifekeeper ast

24Using HPDM Multipath

5 Removing HPDM Multipath ToolsThis chapter addresses the following topic:• Removing HPDM Multipath ToolsRemoving HPDM Multipath ToolsYou can remove H

26Removing HPDM Multipath Tools

6 Troubl eshootingFollowing are the troubleshooting steps for issues that you may encou nter while using HPDM Multipath:• Enter the following commands

28Troubleshooting

7AbbreviationsTable 5 lists the abbreviations or terms used in this document.Table 5 AbbreviationsAbbreviations/Acronyms DefinitionCLICommand-Line Inte

ContentsAboutthisguide ... 5Intendedaudience... 5Documentconventionsandsymbols ...

Tables1 Documentconventions... 52Hardware and SoftwarePrerequisites ... 93HP Recommended configuration

About this guideHP Device Mapper Multipath (HPDM Multipath) software kit is an HP released Device Mapper multipathbinary based on Device Mapper includ

IMPORTANT:Provides clarifying information or specific instructions.NOTE:Provides additional information.HP technical supportTelephone numbers for world

1IntroductiontoHPDMMultipathThis chapter addresses the following topics:•Overview•Features•What'sNew• Software Components• HPDM Multipath Operati

• Provides support for XP20000/XP24000 Disk Arrays.• Provides support for EVA iSCSI devices on RHEL5/RHEL5.1/SLES9 SP3/S LES9 SP4/SLES10/SLES10SP1.Sof

2 Installin g HPDM Multipa thThis chapter addresses the following topics:• HPDM Multipath Support Matrix• Installing HPDM Multipath Tools• Setting Up